Finding the Fourth Proportional to 25,020.38, 34,526.88 and 13,690.10

Step by Step Solution

1. Step 1: Write the proportion equation
   25,020.38 : 34,526.88 = 13,690.10 : x
2. Step 2: Convert to fraction form
   25,020.38/34,526.88 = 13,690.10/x
3. Step 3: Cross multiply
   25,020.38x = 34,526.88 × 13,690.10
4. Step 4: Simplify right side
   25,020.38x = 472,676,439.89
5. Step 5: Solve for x
   x = 472,676,439.89/25,020.38
6. Step 6: Final answer
   x = 18,891.66