Finding the Fourth Proportional to 3,708.89, 5,109.48 and 2,587.79

Step by Step Solution

1. Step 1: Write the proportion equation
   3,708.89 : 5,109.48 = 2,587.79 : x
2. Step 2: Convert to fraction form
   3,708.89/5,109.48 = 2,587.79/x
3. Step 3: Cross multiply
   3,708.89x = 5,109.48 × 2,587.79
4. Step 4: Simplify right side
   3,708.89x = 13,222,261.25
5. Step 5: Solve for x
   x = 13,222,261.25/3,708.89
6. Step 6: Final answer
   x = 3,565.02