Finding the Fourth Proportional to 10,916.32, 16,389.60 and 5,655.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,916.32 : 16,389.60 = 5,655.10 : x
2. Step 2: Convert to fraction form
   10,916.32/16,389.60 = 5,655.10/x
3. Step 3: Cross multiply
   10,916.32x = 16,389.60 × 5,655.10
4. Step 4: Simplify right side
   10,916.32x = 92,684,826.96
5. Step 5: Solve for x
   x = 92,684,826.96/10,916.32
6. Step 6: Final answer
   x = 8,490.48