Finding the Fourth Proportional to 1,689.67, 2,331.54 and 943.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,689.67 : 2,331.54 = 943.61 : x
2. Step 2: Convert to fraction form
   1,689.67/2,331.54 = 943.61/x
3. Step 3: Cross multiply
   1,689.67x = 2,331.54 × 943.61
4. Step 4: Simplify right side
   1,689.67x = 2,200,052.80
5. Step 5: Solve for x
   x = 2,200,052.80/1,689.67
6. Step 6: Final answer
   x = 1,302.06