Finding the Fourth Proportional to 1,417.19, 2,123.27 and 685.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,417.19 : 2,123.27 = 685.17 : x
2. Step 2: Convert to fraction form
   1,417.19/2,123.27 = 685.17/x
3. Step 3: Cross multiply
   1,417.19x = 2,123.27 × 685.17
4. Step 4: Simplify right side
   1,417.19x = 1,454,797.48
5. Step 5: Solve for x
   x = 1,454,797.48/1,417.19
6. Step 6: Final answer
   x = 1,026.54