Finding the Fourth Proportional to 102,499.50, 141,449.34 and 57,787.50

Step by Step Solution

1. Step 1: Write the proportion equation
   102,499.50 : 141,449.34 = 57,787.50 : x
2. Step 2: Convert to fraction form
   102,499.50/141,449.34 = 57,787.50/x
3. Step 3: Cross multiply
   102,499.50x = 141,449.34 × 57,787.50
4. Step 4: Simplify right side
   102,499.50x = 8,174,003,735.25
5. Step 5: Solve for x
   x = 8,174,003,735.25/102,499.50
6. Step 6: Final answer
   x = 79,746.77