Finding the Fourth Proportional to 128,405,030,109.34, 177,199,355,606.54 and 71,312,340,605.85

Step by Step Solution

1. Step 1: Write the proportion equation
   128,405,030,109.34 : 177,199,355,606.54 = 71,312,340,605.85 : x
2. Step 2: Convert to fraction form
   128,405,030,109.34/177,199,355,606.54 = 71,312,340,605.85/x
3. Step 3: Cross multiply
   128,405,030,109.34x = 177,199,355,606.54 × 71,312,340,605.85
4. Step 4: Simplify right side
   128,405,030,109.34x = 12,636,500,802,150,718,242,816
5. Step 5: Solve for x
   x = 12,636,500,802,150,718,242,816/128,405,030,109.34
6. Step 6: Final answer
   x = 98,411,259,990.29