Finding the Fourth Proportional to 25,098.86, 34,636.43 and 13,920.86

Step by Step Solution

1. Step 1: Write the proportion equation
   25,098.86 : 34,636.43 = 13,920.86 : x
2. Step 2: Convert to fraction form
   25,098.86/34,636.43 = 13,920.86/x
3. Step 3: Cross multiply
   25,098.86x = 34,636.43 × 13,920.86
4. Step 4: Simplify right side
   25,098.86x = 482,168,719.75
5. Step 5: Solve for x
   x = 482,168,719.75/25,098.86
6. Step 6: Final answer
   x = 19,210.79