Finding the Fourth Proportional to 1,223.86, 1,689.22 and 700.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,223.86 : 1,689.22 = 700.18 : x
2. Step 2: Convert to fraction form
   1,223.86/1,689.22 = 700.18/x
3. Step 3: Cross multiply
   1,223.86x = 1,689.22 × 700.18
4. Step 4: Simplify right side
   1,223.86x = 1,182,758.06
5. Step 5: Solve for x
   x = 1,182,758.06/1,223.86
6. Step 6: Final answer
   x = 966.42