Finding the Fourth Proportional to 25,156.38, 34,715.81 and 13,978.38

Step by Step Solution

1. Step 1: Write the proportion equation
   25,156.38 : 34,715.81 = 13,978.38 : x
2. Step 2: Convert to fraction form
   25,156.38/34,715.81 = 13,978.38/x
3. Step 3: Cross multiply
   25,156.38x = 34,715.81 × 13,978.38
4. Step 4: Simplify right side
   25,156.38x = 485,270,784.19
5. Step 5: Solve for x
   x = 485,270,784.19/25,156.38
6. Step 6: Final answer
   x = 19,290.17