Finding the Fourth Proportional to 8,916.89, 12,305.45 and 4,938.23

Step by Step Solution

1. Step 1: Write the proportion equation
   8,916.89 : 12,305.45 = 4,938.23 : x
2. Step 2: Convert to fraction form
   8,916.89/12,305.45 = 4,938.23/x
3. Step 3: Cross multiply
   8,916.89x = 12,305.45 × 4,938.23
4. Step 4: Simplify right side
   8,916.89x = 60,767,185.46
5. Step 5: Solve for x
   x = 60,767,185.46/8,916.89
6. Step 6: Final answer
   x = 6,814.84