Finding the Fourth Proportional to 76,724.76, 105,872.61 and 42,732.09

Step by Step Solution

1. Step 1: Write the proportion equation
   76,724.76 : 105,872.61 = 42,732.09 : x
2. Step 2: Convert to fraction form
   76,724.76/105,872.61 = 42,732.09/x
3. Step 3: Cross multiply
   76,724.76x = 105,872.61 × 42,732.09
4. Step 4: Simplify right side
   76,724.76x = 4,524,157,899.05
5. Step 5: Solve for x
   x = 4,524,157,899.05/76,724.76
6. Step 6: Final answer
   x = 58,966.07