Finding the Fourth Proportional to 52,179.53, 78,129.06 and 42,931.15

Step by Step Solution

1. Step 1: Write the proportion equation
   52,179.53 : 78,129.06 = 42,931.15 : x
2. Step 2: Convert to fraction form
   52,179.53/78,129.06 = 42,931.15/x
3. Step 3: Cross multiply
   52,179.53x = 78,129.06 × 42,931.15
4. Step 4: Simplify right side
   52,179.53x = 3,354,170,037.90
5. Step 5: Solve for x
   x = 3,354,170,037.90/52,179.53
6. Step 6: Final answer
   x = 64,281.34