Finding the Fourth Proportional to 25,116.78, 34,661.52 and 13,938.78

Step by Step Solution

1. Step 1: Write the proportion equation
   25,116.78 : 34,661.52 = 13,938.78 : x
2. Step 2: Convert to fraction form
   25,116.78/34,661.52 = 13,938.78/x
3. Step 3: Cross multiply
   25,116.78x = 34,661.52 × 13,938.78
4. Step 4: Simplify right side
   25,116.78x = 483,139,301.75
5. Step 5: Solve for x
   x = 483,139,301.75/25,116.78
6. Step 6: Final answer
   x = 19,235.72