Finding the Fourth Proportional to 25,099.86, 34,637.81 and 13,921.86

Step by Step Solution

1. Step 1: Write the proportion equation
   25,099.86 : 34,637.81 = 13,921.86 : x
2. Step 2: Convert to fraction form
   25,099.86/34,637.81 = 13,921.86/x
3. Step 3: Cross multiply
   25,099.86x = 34,637.81 × 13,921.86
4. Step 4: Simplify right side
   25,099.86x = 482,222,741.53
5. Step 5: Solve for x
   x = 482,222,741.53/25,099.86
6. Step 6: Final answer
   x = 19,212.17