Finding the Fourth Proportional to 18,470.05, 25,488.69 and 10,086.55

Step by Step Solution

1. Step 1: Write the proportion equation
   18,470.05 : 25,488.69 = 10,086.55 : x
2. Step 2: Convert to fraction form
   18,470.05/25,488.69 = 10,086.55/x
3. Step 3: Cross multiply
   18,470.05x = 25,488.69 × 10,086.55
4. Step 4: Simplify right side
   18,470.05x = 257,092,946.12
5. Step 5: Solve for x
   x = 257,092,946.12/18,470.05
6. Step 6: Final answer
   x = 13,919.45