Finding the Fourth Proportional to 8,917.56, 12,309.33 and 5,142.24

Step by Step Solution

1. Step 1: Write the proportion equation
   8,917.56 : 12,309.33 = 5,142.24 : x
2. Step 2: Convert to fraction form
   8,917.56/12,309.33 = 5,142.24/x
3. Step 3: Cross multiply
   8,917.56x = 12,309.33 × 5,142.24
4. Step 4: Simplify right side
   8,917.56x = 63,297,529.10
5. Step 5: Solve for x
   x = 63,297,529.10/8,917.56
6. Step 6: Final answer
   x = 7,098.08