Finding the Fourth Proportional to 76,691.92, 105,834.60 and 42,700.24

Step by Step Solution

1. Step 1: Write the proportion equation
   76,691.92 : 105,834.60 = 42,700.24 : x
2. Step 2: Convert to fraction form
   76,691.92/105,834.60 = 42,700.24/x
3. Step 3: Cross multiply
   76,691.92x = 105,834.60 × 42,700.24
4. Step 4: Simplify right side
   76,691.92x = 4,519,162,820.30
5. Step 5: Solve for x
   x = 4,519,162,820.30/76,691.92
6. Step 6: Final answer
   x = 58,926.19