Finding the Fourth Proportional to 11,061.90, 16,507.88 and 9,879.54

Step by Step Solution

1. Step 1: Write the proportion equation
   11,061.90 : 16,507.88 = 9,879.54 : x
2. Step 2: Convert to fraction form
   11,061.90/16,507.88 = 9,879.54/x
3. Step 3: Cross multiply
   11,061.90x = 16,507.88 × 9,879.54
4. Step 4: Simplify right side
   11,061.90x = 163,090,260.78
5. Step 5: Solve for x
   x = 163,090,260.78/11,061.90
6. Step 6: Final answer
   x = 14,743.42