Finding the Fourth Proportional to 1,061.78, 1,466.01 and 689.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.78 : 1,466.01 = 689.00 : x
2. Step 2: Convert to fraction form
   1,061.78/1,466.01 = 689.00/x
3. Step 3: Cross multiply
   1,061.78x = 1,466.01 × 689.00
4. Step 4: Simplify right side
   1,061.78x = 1,010,073.56
5. Step 5: Solve for x
   x = 1,010,073.56/1,061.78
6. Step 6: Final answer
   x = 951.31