Finding the Fourth Proportional to 8,931.69, 12,325.33 and 5,155.53

Step by Step Solution

1. Step 1: Write the proportion equation
   8,931.69 : 12,325.33 = 5,155.53 : x
2. Step 2: Convert to fraction form
   8,931.69/12,325.33 = 5,155.53/x
3. Step 3: Cross multiply
   8,931.69x = 12,325.33 × 5,155.53
4. Step 4: Simplify right side
   8,931.69x = 63,543,568.80
5. Step 5: Solve for x
   x = 63,543,568.80/8,931.69
6. Step 6: Final answer
   x = 7,114.39