Finding the Fourth Proportional to 55,123.20, 82,761.60 and 34,387.20

Step by Step Solution

1. Step 1: Write the proportion equation
   55,123.20 : 82,761.60 = 34,387.20 : x
2. Step 2: Convert to fraction form
   55,123.20/82,761.60 = 34,387.20/x
3. Step 3: Cross multiply
   55,123.20x = 82,761.60 × 34,387.20
4. Step 4: Simplify right side
   55,123.20x = 2,845,939,691.52
5. Step 5: Solve for x
   x = 2,845,939,691.52/55,123.20
6. Step 6: Final answer
   x = 51,628.71