Finding the Fourth Proportional to 18,470.69, 25,488.50 and 10,917.71

Step by Step Solution

1. Step 1: Write the proportion equation
   18,470.69 : 25,488.50 = 10,917.71 : x
2. Step 2: Convert to fraction form
   18,470.69/25,488.50 = 10,917.71/x
3. Step 3: Cross multiply
   18,470.69x = 25,488.50 × 10,917.71
4. Step 4: Simplify right side
   18,470.69x = 278,276,060.47
5. Step 5: Solve for x
   x = 278,276,060.47/18,470.69
6. Step 6: Final answer
   x = 15,065.82