Finding the Fourth Proportional to 1,662.87, 2,294.78 and 916.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,662.87 : 2,294.78 = 916.86 : x
2. Step 2: Convert to fraction form
   1,662.87/2,294.78 = 916.86/x
3. Step 3: Cross multiply
   1,662.87x = 2,294.78 × 916.86
4. Step 4: Simplify right side
   1,662.87x = 2,103,977.94
5. Step 5: Solve for x
   x = 2,103,977.94/1,662.87
6. Step 6: Final answer
   x = 1,265.27