Finding the Fourth Proportional to 56,115.52, 77,439.36 and 30,966.72

Step by Step Solution

1. Step 1: Write the proportion equation
   56,115.52 : 77,439.36 = 30,966.72 : x
2. Step 2: Convert to fraction form
   56,115.52/77,439.36 = 30,966.72/x
3. Step 3: Cross multiply
   56,115.52x = 77,439.36 × 30,966.72
4. Step 4: Simplify right side
   56,115.52x = 2,398,042,978.10
5. Step 5: Solve for x
   x = 2,398,042,978.10/56,115.52
6. Step 6: Final answer
   x = 42,734.04