Finding the Fourth Proportional to 27,978.88, 42,134.88 and 25,237.12

Step by Step Solution

1. Step 1: Write the proportion equation
   27,978.88 : 42,134.88 = 25,237.12 : x
2. Step 2: Convert to fraction form
   27,978.88/42,134.88 = 25,237.12/x
3. Step 3: Cross multiply
   27,978.88x = 42,134.88 × 25,237.12
4. Step 4: Simplify right side
   27,978.88x = 1,063,363,022.75
5. Step 5: Solve for x
   x = 1,063,363,022.75/27,978.88
6. Step 6: Final answer
   x = 38,005.92