Finding the Fourth Proportional to 2,864.01, 4,296.42 and 915.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,864.01 : 4,296.42 = 915.78 : x
2. Step 2: Convert to fraction form
   2,864.01/4,296.42 = 915.78/x
3. Step 3: Cross multiply
   2,864.01x = 4,296.42 × 915.78
4. Step 4: Simplify right side
   2,864.01x = 3,934,575.51
5. Step 5: Solve for x
   x = 3,934,575.51/2,864.01
6. Step 6: Final answer
   x = 1,373.80