Finding the Fourth Proportional to 10,999.56, 15,167.82 and 8,317.08

Step by Step Solution

1. Step 1: Write the proportion equation
   10,999.56 : 15,167.82 = 8,317.08 : x
2. Step 2: Convert to fraction form
   10,999.56/15,167.82 = 8,317.08/x
3. Step 3: Cross multiply
   10,999.56x = 15,167.82 × 8,317.08
4. Step 4: Simplify right side
   10,999.56x = 126,151,972.37
5. Step 5: Solve for x
   x = 126,151,972.37/10,999.56
6. Step 6: Final answer
   x = 11,468.82