Finding the Fourth Proportional to 2,864.72, 4,296.17 and 916.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,864.72 : 4,296.17 = 916.47 : x
2. Step 2: Convert to fraction form
   2,864.72/4,296.17 = 916.47/x
3. Step 3: Cross multiply
   2,864.72x = 4,296.17 × 916.47
4. Step 4: Simplify right side
   2,864.72x = 3,937,313.21
5. Step 5: Solve for x
   x = 3,937,313.21/2,864.72
6. Step 6: Final answer
   x = 1,374.41