Finding the Fourth Proportional to 25,012.91, 34,516.52 and 13,680.20

Step by Step Solution

1. Step 1: Write the proportion equation
   25,012.91 : 34,516.52 = 13,680.20 : x
2. Step 2: Convert to fraction form
   25,012.91/34,516.52 = 13,680.20/x
3. Step 3: Cross multiply
   25,012.91x = 34,516.52 × 13,680.20
4. Step 4: Simplify right side
   25,012.91x = 472,192,724.32
5. Step 5: Solve for x
   x = 472,192,724.32/25,012.91
6. Step 6: Final answer
   x = 18,877.96