Finding the Fourth Proportional to 136,870,427.72, 188,873,967.54 and 78,130,757

Step by Step Solution

1. Step 1: Write the proportion equation
   136,870,427.72 : 188,873,967.54 = 78,130,757 : x
2. Step 2: Convert to fraction form
   136,870,427.72/188,873,967.54 = 78,130,757/x
3. Step 3: Cross multiply
   136,870,427.72x = 188,873,967.54 × 78,130,757
4. Step 4: Simplify right side
   136,870,427.72x = 14,756,866,061,493,628
5. Step 5: Solve for x
   x = 14,756,866,061,493,628/136,870,427.72
6. Step 6: Final answer
   x = 107,816,321.67