Finding the Fourth Proportional to 56,580.18, 78,080.49 and 31,429.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,580.18 : 78,080.49 = 31,429.50 : x
2. Step 2: Convert to fraction form
   56,580.18/78,080.49 = 31,429.50/x
3. Step 3: Cross multiply
   56,580.18x = 78,080.49 × 31,429.50
4. Step 4: Simplify right side
   56,580.18x = 2,454,030,760.46
5. Step 5: Solve for x
   x = 2,454,030,760.46/56,580.18
6. Step 6: Final answer
   x = 43,372.62