Finding the Fourth Proportional to 2,124.59, 3,175.50 and 1,915.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,124.59 : 3,175.50 = 1,915.88 : x
2. Step 2: Convert to fraction form
   2,124.59/3,175.50 = 1,915.88/x
3. Step 3: Cross multiply
   2,124.59x = 3,175.50 × 1,915.88
4. Step 4: Simplify right side
   2,124.59x = 6,083,867.36
5. Step 5: Solve for x
   x = 6,083,867.36/2,124.59
6. Step 6: Final answer
   x = 2,863.55