Finding the Fourth Proportional to 18,470.80, 25,488.30 and 10,087.30

Step by Step Solution

1. Step 1: Write the proportion equation
   18,470.80 : 25,488.30 = 10,087.30 : x
2. Step 2: Convert to fraction form
   18,470.80/25,488.30 = 10,087.30/x
3. Step 3: Cross multiply
   18,470.80x = 25,488.30 × 10,087.30
4. Step 4: Simplify right side
   18,470.80x = 257,108,128.59
5. Step 5: Solve for x
   x = 257,108,128.59/18,470.80
6. Step 6: Final answer
   x = 13,919.71