Finding the Fourth Proportional to 10,842.06, 14,945.70 and 8,480.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,842.06 : 14,945.70 = 8,480.10 : x
2. Step 2: Convert to fraction form
   10,842.06/14,945.70 = 8,480.10/x
3. Step 3: Cross multiply
   10,842.06x = 14,945.70 × 8,480.10
4. Step 4: Simplify right side
   10,842.06x = 126,741,030.57
5. Step 5: Solve for x
   x = 126,741,030.57/10,842.06
6. Step 6: Final answer
   x = 11,689.76