Finding the Fourth Proportional to 8,916.48, 13,367.18 and 5,622.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,916.48 : 13,367.18 = 5,622.31 : x
2. Step 2: Convert to fraction form
   8,916.48/13,367.18 = 5,622.31/x
3. Step 3: Cross multiply
   8,916.48x = 13,367.18 × 5,622.31
4. Step 4: Simplify right side
   8,916.48x = 75,154,429.79
5. Step 5: Solve for x
   x = 75,154,429.79/8,916.48
6. Step 6: Final answer
   x = 8,428.72