Finding the Fourth Proportional to 10,155.12, 15,230.16 and 3,912.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,155.12 : 15,230.16 = 3,912.72 : x
2. Step 2: Convert to fraction form
   10,155.12/15,230.16 = 3,912.72/x
3. Step 3: Cross multiply
   10,155.12x = 15,230.16 × 3,912.72
4. Step 4: Simplify right side
   10,155.12x = 59,591,351.64
5. Step 5: Solve for x
   x = 59,591,351.64/10,155.12
6. Step 6: Final answer
   x = 5,868.11