Finding the Fourth Proportional to 1,061.91, 1,465.83 and 689.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.91 : 1,465.83 = 689.31 : x
2. Step 2: Convert to fraction form
   1,061.91/1,465.83 = 689.31/x
3. Step 3: Cross multiply
   1,061.91x = 1,465.83 × 689.31
4. Step 4: Simplify right side
   1,061.91x = 1,010,411.28
5. Step 5: Solve for x
   x = 1,010,411.28/1,061.91
6. Step 6: Final answer
   x = 951.50