Finding the Fourth Proportional to 25,308.72, 34,927.02 and 13,978.80

Step by Step Solution

1. Step 1: Write the proportion equation
   25,308.72 : 34,927.02 = 13,978.80 : x
2. Step 2: Convert to fraction form
   25,308.72/34,927.02 = 13,978.80/x
3. Step 3: Cross multiply
   25,308.72x = 34,927.02 × 13,978.80
4. Step 4: Simplify right side
   25,308.72x = 488,237,827.18
5. Step 5: Solve for x
   x = 488,237,827.18/25,308.72
6. Step 6: Final answer
   x = 19,291.29