Finding the Fourth Proportional to 25,099.50, 34,637.31 and 13,921.50

Step by Step Solution

1. Step 1: Write the proportion equation
   25,099.50 : 34,637.31 = 13,921.50 : x
2. Step 2: Convert to fraction form
   25,099.50/34,637.31 = 13,921.50/x
3. Step 3: Cross multiply
   25,099.50x = 34,637.31 × 13,921.50
4. Step 4: Simplify right side
   25,099.50x = 482,203,311.17
5. Step 5: Solve for x
   x = 482,203,311.17/25,099.50
6. Step 6: Final answer
   x = 19,211.67