Finding the Fourth Proportional to 5,587.36, 7,708.56 and 3,721.12

Step by Step Solution

1. Step 1: Write the proportion equation
   5,587.36 : 7,708.56 = 3,721.12 : x
2. Step 2: Convert to fraction form
   5,587.36/7,708.56 = 3,721.12/x
3. Step 3: Cross multiply
   5,587.36x = 7,708.56 × 3,721.12
4. Step 4: Simplify right side
   5,587.36x = 28,684,476.79
5. Step 5: Solve for x
   x = 28,684,476.79/5,587.36
6. Step 6: Final answer
   x = 5,133.82