Finding the Fourth Proportional to 8,916.18, 12,301.55 and 5,138.83

Step by Step Solution

1. Step 1: Write the proportion equation
   8,916.18 : 12,301.55 = 5,138.83 : x
2. Step 2: Convert to fraction form
   8,916.18/12,301.55 = 5,138.83/x
3. Step 3: Cross multiply
   8,916.18x = 12,301.55 × 5,138.83
4. Step 4: Simplify right side
   8,916.18x = 63,215,574.19
5. Step 5: Solve for x
   x = 63,215,574.19/8,916.18
6. Step 6: Final answer
   x = 7,089.98