Finding the Fourth Proportional to 6,870.24, 9,480.96 and 3,726.72

Step by Step Solution

1. Step 1: Write the proportion equation
   6,870.24 : 9,480.96 = 3,726.72 : x
2. Step 2: Convert to fraction form
   6,870.24/9,480.96 = 3,726.72/x
3. Step 3: Cross multiply
   6,870.24x = 9,480.96 × 3,726.72
4. Step 4: Simplify right side
   6,870.24x = 35,332,883.25
5. Step 5: Solve for x
   x = 35,332,883.25/6,870.24
6. Step 6: Final answer
   x = 5,142.89