Finding the Fourth Proportional to 1,665.86, 2,298.93 and 919.85

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.86 : 2,298.93 = 919.85 : x
2. Step 2: Convert to fraction form
   1,665.86/2,298.93 = 919.85/x
3. Step 3: Cross multiply
   1,665.86x = 2,298.93 × 919.85
4. Step 4: Simplify right side
   1,665.86x = 2,114,670.76
5. Step 5: Solve for x
   x = 2,114,670.76/1,665.86
6. Step 6: Final answer
   x = 1,269.42