Finding the Fourth Proportional to 115,505,558.28, 173,141,752.52 and 72,405,028.87

Step by Step Solution

1. Step 1: Write the proportion equation
   115,505,558.28 : 173,141,752.52 = 72,405,028.87 : x
2. Step 2: Convert to fraction form
   115,505,558.28/173,141,752.52 = 72,405,028.87/x
3. Step 3: Cross multiply
   115,505,558.28x = 173,141,752.52 × 72,405,028.87
4. Step 4: Simplify right side
   115,505,558.28x = 12,536,333,589,561,156
5. Step 5: Solve for x
   x = 12,536,333,589,561,156/115,505,558.28
6. Step 6: Final answer
   x = 108,534,461.69