Finding the Fourth Proportional to 8,931.69, 12,325.32 and 5,155.54

Step by Step Solution

1. Step 1: Write the proportion equation
   8,931.69 : 12,325.32 = 5,155.54 : x
2. Step 2: Convert to fraction form
   8,931.69/12,325.32 = 5,155.54/x
3. Step 3: Cross multiply
   8,931.69x = 12,325.32 × 5,155.54
4. Step 4: Simplify right side
   8,931.69x = 63,543,649.46
5. Step 5: Solve for x
   x = 63,543,649.46/8,931.69
6. Step 6: Final answer
   x = 7,114.40