Finding the Fourth Proportional to 10,999.83, 16,490.46 and 7,479.97

Step by Step Solution

1. Step 1: Write the proportion equation
   10,999.83 : 16,490.46 = 7,479.97 : x
2. Step 2: Convert to fraction form
   10,999.83/16,490.46 = 7,479.97/x
3. Step 3: Cross multiply
   10,999.83x = 16,490.46 × 7,479.97
4. Step 4: Simplify right side
   10,999.83x = 123,348,146.09
5. Step 5: Solve for x
   x = 123,348,146.09/10,999.83
6. Step 6: Final answer
   x = 11,213.65