Finding the Fourth Proportional to 3,915.36, 5,875.20 and 1,724.16

Step by Step Solution

1. Step 1: Write the proportion equation
   3,915.36 : 5,875.20 = 1,724.16 : x
2. Step 2: Convert to fraction form
   3,915.36/5,875.20 = 1,724.16/x
3. Step 3: Cross multiply
   3,915.36x = 5,875.20 × 1,724.16
4. Step 4: Simplify right side
   3,915.36x = 10,129,784.83
5. Step 5: Solve for x
   x = 10,129,784.83/3,915.36
6. Step 6: Final answer
   x = 2,587.19