Finding the Fourth Proportional to 31,978.37, 44,129.54 and 17,639.55

Step by Step Solution

1. Step 1: Write the proportion equation
   31,978.37 : 44,129.54 = 17,639.55 : x
2. Step 2: Convert to fraction form
   31,978.37/44,129.54 = 17,639.55/x
3. Step 3: Cross multiply
   31,978.37x = 44,129.54 × 17,639.55
4. Step 4: Simplify right side
   31,978.37x = 778,425,227.31
5. Step 5: Solve for x
   x = 778,425,227.31/31,978.37
6. Step 6: Final answer
   x = 24,342.24