Finding the Fourth Proportional to 10,390.43, 14,320.25 and 7,866.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,390.43 : 14,320.25 = 7,866.50 : x
2. Step 2: Convert to fraction form
   10,390.43/14,320.25 = 7,866.50/x
3. Step 3: Cross multiply
   10,390.43x = 14,320.25 × 7,866.50
4. Step 4: Simplify right side
   10,390.43x = 112,650,135.69
5. Step 5: Solve for x
   x = 112,650,135.69/10,390.43
6. Step 6: Final answer
   x = 10,841.73