Finding the Fourth Proportional to 76,132.50, 105,063.06 and 42,143.40

Step by Step Solution

1. Step 1: Write the proportion equation
   76,132.50 : 105,063.06 = 42,143.40 : x
2. Step 2: Convert to fraction form
   76,132.50/105,063.06 = 42,143.40/x
3. Step 3: Cross multiply
   76,132.50x = 105,063.06 × 42,143.40
4. Step 4: Simplify right side
   76,132.50x = 4,427,714,562.80
5. Step 5: Solve for x
   x = 4,427,714,562.80/76,132.50
6. Step 6: Final answer
   x = 58,158.01