Finding the Fourth Proportional to 128,500.33, 177,327.69 and 71,136.34

Step by Step Solution

1. Step 1: Write the proportion equation
   128,500.33 : 177,327.69 = 71,136.34 : x
2. Step 2: Convert to fraction form
   128,500.33/177,327.69 = 71,136.34/x
3. Step 3: Cross multiply
   128,500.33x = 177,327.69 × 71,136.34
4. Step 4: Simplify right side
   128,500.33x = 12,614,442,847.25
5. Step 5: Solve for x
   x = 12,614,442,847.25/128,500.33
6. Step 6: Final answer
   x = 98,166.62