Finding the Fourth Proportional to 1,689.73, 2,331.43 and 981.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,689.73 : 2,331.43 = 981.69 : x
2. Step 2: Convert to fraction form
   1,689.73/2,331.43 = 981.69/x
3. Step 3: Cross multiply
   1,689.73x = 2,331.43 × 981.69
4. Step 4: Simplify right side
   1,689.73x = 2,288,741.52
5. Step 5: Solve for x
   x = 2,288,741.52/1,689.73
6. Step 6: Final answer
   x = 1,354.50