Finding the Fourth Proportional to 1,224.59, 1,689.89 and 700.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,224.59 : 1,689.89 = 700.61 : x
2. Step 2: Convert to fraction form
   1,224.59/1,689.89 = 700.61/x
3. Step 3: Cross multiply
   1,224.59x = 1,689.89 × 700.61
4. Step 4: Simplify right side
   1,224.59x = 1,183,941.88
5. Step 5: Solve for x
   x = 1,183,941.88/1,224.59
6. Step 6: Final answer
   x = 966.81