Finding the Fourth Proportional to 54,978.72, 75,857.96 and 31,100.24

Step by Step Solution

1. Step 1: Write the proportion equation
   54,978.72 : 75,857.96 = 31,100.24 : x
2. Step 2: Convert to fraction form
   54,978.72/75,857.96 = 31,100.24/x
3. Step 3: Cross multiply
   54,978.72x = 75,857.96 × 31,100.24
4. Step 4: Simplify right side
   54,978.72x = 2,359,200,761.91
5. Step 5: Solve for x
   x = 2,359,200,761.91/54,978.72
6. Step 6: Final answer
   x = 42,911.16