Finding the Fourth Proportional to 102,685.02, 141,702.56 and 56,116.05

Step by Step Solution

1. Step 1: Write the proportion equation
   102,685.02 : 141,702.56 = 56,116.05 : x
2. Step 2: Convert to fraction form
   102,685.02/141,702.56 = 56,116.05/x
3. Step 3: Cross multiply
   102,685.02x = 141,702.56 × 56,116.05
4. Step 4: Simplify right side
   102,685.02x = 7,951,787,942.09
5. Step 5: Solve for x
   x = 7,951,787,942.09/102,685.02
6. Step 6: Final answer
   x = 77,438.64