Finding the Fourth Proportional to 10,999.08, 16,489.34 and 7,479.22

Step by Step Solution

1. Step 1: Write the proportion equation
   10,999.08 : 16,489.34 = 7,479.22 : x
2. Step 2: Convert to fraction form
   10,999.08/16,489.34 = 7,479.22/x
3. Step 3: Cross multiply
   10,999.08x = 16,489.34 × 7,479.22
4. Step 4: Simplify right side
   10,999.08x = 123,327,401.51
5. Step 5: Solve for x
   x = 123,327,401.51/10,999.08
6. Step 6: Final answer
   x = 11,212.52