Finding the Fourth Proportional to 25,308.71, 34,926.29 and 13,978.49

Step by Step Solution

1. Step 1: Write the proportion equation
   25,308.71 : 34,926.29 = 13,978.49 : x
2. Step 2: Convert to fraction form
   25,308.71/34,926.29 = 13,978.49/x
3. Step 3: Cross multiply
   25,308.71x = 34,926.29 × 13,978.49
4. Step 4: Simplify right side
   25,308.71x = 488,216,812.93
5. Step 5: Solve for x
   x = 488,216,812.93/25,308.71
6. Step 6: Final answer
   x = 19,290.46