Finding the Fourth Proportional to 5,726.72, 8,585.76 and 3,873.20

Step by Step Solution

1. Step 1: Write the proportion equation
   5,726.72 : 8,585.76 = 3,873.20 : x
2. Step 2: Convert to fraction form
   5,726.72/8,585.76 = 3,873.20/x
3. Step 3: Cross multiply
   5,726.72x = 8,585.76 × 3,873.20
4. Step 4: Simplify right side
   5,726.72x = 33,254,365.63
5. Step 5: Solve for x
   x = 33,254,365.63/5,726.72
6. Step 6: Final answer
   x = 5,806.88