Finding the Fourth Proportional to 76,484.43, 105,548.31 and 42,492.78

Step by Step Solution

1. Step 1: Write the proportion equation
   76,484.43 : 105,548.31 = 42,492.78 : x
2. Step 2: Convert to fraction form
   76,484.43/105,548.31 = 42,492.78/x
3. Step 3: Cross multiply
   76,484.43x = 105,548.31 × 42,492.78
4. Step 4: Simplify right side
   76,484.43x = 4,485,041,116.20
5. Step 5: Solve for x
   x = 4,485,041,116.20/76,484.43
6. Step 6: Final answer
   x = 58,639.92