Finding the Fourth Proportional to 10,828.80, 14,950.56 and 9,708

Step by Step Solution

1. Step 1: Write the proportion equation
   10,828.80 : 14,950.56 = 9,708 : x
2. Step 2: Convert to fraction form
   10,828.80/14,950.56 = 9,708/x
3. Step 3: Cross multiply
   10,828.80x = 14,950.56 × 9,708
4. Step 4: Simplify right side
   10,828.80x = 145,140,036.48
5. Step 5: Solve for x
   x = 145,140,036.48/10,828.80
6. Step 6: Final answer
   x = 13,403.15