Finding the Fourth Proportional to 1,662.89, 2,294.80 and 916.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,662.89 : 2,294.80 = 916.87 : x
2. Step 2: Convert to fraction form
   1,662.89/2,294.80 = 916.87/x
3. Step 3: Cross multiply
   1,662.89x = 2,294.80 × 916.87
4. Step 4: Simplify right side
   1,662.89x = 2,104,039.01
5. Step 5: Solve for x
   x = 2,104,039.01/1,662.89
6. Step 6: Final answer
   x = 1,265.29