Finding the Fourth Proportional to 2,864.15, 4,296.54 and 915.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,864.15 : 4,296.54 = 915.89 : x
2. Step 2: Convert to fraction form
   2,864.15/4,296.54 = 915.89/x
3. Step 3: Cross multiply
   2,864.15x = 4,296.54 × 915.89
4. Step 4: Simplify right side
   2,864.15x = 3,935,158.02
5. Step 5: Solve for x
   x = 3,935,158.02/2,864.15
6. Step 6: Final answer
   x = 1,373.94