Finding the Fourth Proportional to 102,931.94, 142,025.89 and 57,611.90

Step by Step Solution

1. Step 1: Write the proportion equation
   102,931.94 : 142,025.89 = 57,611.90 : x
2. Step 2: Convert to fraction form
   102,931.94/142,025.89 = 57,611.90/x
3. Step 3: Cross multiply
   102,931.94x = 142,025.89 × 57,611.90
4. Step 4: Simplify right side
   102,931.94x = 8,182,381,372.09
5. Step 5: Solve for x
   x = 8,182,381,372.09/102,931.94
6. Step 6: Final answer
   x = 79,493.12