Finding the Fourth Proportional to 2,559.52, 3,839.10 and 915.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,559.52 : 3,839.10 = 915.76 : x
2. Step 2: Convert to fraction form
   2,559.52/3,839.10 = 915.76/x
3. Step 3: Cross multiply
   2,559.52x = 3,839.10 × 915.76
4. Step 4: Simplify right side
   2,559.52x = 3,515,694.22
5. Step 5: Solve for x
   x = 3,515,694.22/2,559.52
6. Step 6: Final answer
   x = 1,373.58