Finding the Fourth Proportional to 136,610,773.20, 204,587,757.72 and 78,141,240.72

Step by Step Solution

1. Step 1: Write the proportion equation
   136,610,773.20 : 204,587,757.72 = 78,141,240.72 : x
2. Step 2: Convert to fraction form
   136,610,773.20/204,587,757.72 = 78,141,240.72/x
3. Step 3: Cross multiply
   136,610,773.20x = 204,587,757.72 × 78,141,240.72
4. Step 4: Simplify right side
   136,610,773.20x = 15,986,741,224,363,558
5. Step 5: Solve for x
   x = 15,986,741,224,363,558/136,610,773.20
6. Step 6: Final answer
   x = 117,024,015.38