Finding the Fourth Proportional to 2,017.59, 3,026.79 and 921.66

Step by Step Solution

1. Step 1: Write the proportion equation
   2,017.59 : 3,026.79 = 921.66 : x
2. Step 2: Convert to fraction form
   2,017.59/3,026.79 = 921.66/x
3. Step 3: Cross multiply
   2,017.59x = 3,026.79 × 921.66
4. Step 4: Simplify right side
   2,017.59x = 2,789,671.27
5. Step 5: Solve for x
   x = 2,789,671.27/2,017.59
6. Step 6: Final answer
   x = 1,382.68