Finding the Fourth Proportional to 1,615.55, 2,425.15 and 1,068.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,615.55 : 2,425.15 = 1,068.80 : x
2. Step 2: Convert to fraction form
   1,615.55/2,425.15 = 1,068.80/x
3. Step 3: Cross multiply
   1,615.55x = 2,425.15 × 1,068.80
4. Step 4: Simplify right side
   1,615.55x = 2,592,000.32
5. Step 5: Solve for x
   x = 2,592,000.32/1,615.55
6. Step 6: Final answer
   x = 1,604.41