Finding the Fourth Proportional to 26,128.89, 39,166.49 and 10,327.50

Step by Step Solution

1. Step 1: Write the proportion equation
   26,128.89 : 39,166.49 = 10,327.50 : x
2. Step 2: Convert to fraction form
   26,128.89/39,166.49 = 10,327.50/x
3. Step 3: Cross multiply
   26,128.89x = 39,166.49 × 10,327.50
4. Step 4: Simplify right side
   26,128.89x = 404,491,678.01
5. Step 5: Solve for x
   x = 404,491,678.01/26,128.89
6. Step 6: Final answer
   x = 15,480.63