Finding the Fourth Proportional to 8,916.16, 12,300.43 and 5,377.40

Step by Step Solution

1. Step 1: Write the proportion equation
   8,916.16 : 12,300.43 = 5,377.40 : x
2. Step 2: Convert to fraction form
   8,916.16/12,300.43 = 5,377.40/x
3. Step 3: Cross multiply
   8,916.16x = 12,300.43 × 5,377.40
4. Step 4: Simplify right side
   8,916.16x = 66,144,332.28
5. Step 5: Solve for x
   x = 66,144,332.28/8,916.16
6. Step 6: Final answer
   x = 7,418.48