Finding the Fourth Proportional to 1,418.30, 2,124.06 and 685.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,418.30 : 2,124.06 = 685.52 : x
2. Step 2: Convert to fraction form
   1,418.30/2,124.06 = 685.52/x
3. Step 3: Cross multiply
   1,418.30x = 2,124.06 × 685.52
4. Step 4: Simplify right side
   1,418.30x = 1,456,085.61
5. Step 5: Solve for x
   x = 1,456,085.61/1,418.30
6. Step 6: Final answer
   x = 1,026.64