Finding the Fourth Proportional to 1,665.94, 2,298.98 and 919.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.94 : 2,298.98 = 919.91 : x
2. Step 2: Convert to fraction form
   1,665.94/2,298.98 = 919.91/x
3. Step 3: Cross multiply
   1,665.94x = 2,298.98 × 919.91
4. Step 4: Simplify right side
   1,665.94x = 2,114,854.69
5. Step 5: Solve for x
   x = 2,114,854.69/1,665.94
6. Step 6: Final answer
   x = 1,269.47