Finding the Fourth Proportional to 3,915.82, 5,403.15 and 2,588.83

Step by Step Solution

1. Step 1: Write the proportion equation
   3,915.82 : 5,403.15 = 2,588.83 : x
2. Step 2: Convert to fraction form
   3,915.82/5,403.15 = 2,588.83/x
3. Step 3: Cross multiply
   3,915.82x = 5,403.15 × 2,588.83
4. Step 4: Simplify right side
   3,915.82x = 13,987,836.81
5. Step 5: Solve for x
   x = 13,987,836.81/3,915.82
6. Step 6: Final answer
   x = 3,572.13