Finding the Fourth Proportional to 1,088.01, 1,500.66 and 689.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,088.01 : 1,500.66 = 689.79 : x
2. Step 2: Convert to fraction form
   1,088.01/1,500.66 = 689.79/x
3. Step 3: Cross multiply
   1,088.01x = 1,500.66 × 689.79
4. Step 4: Simplify right side
   1,088.01x = 1,035,145.89
5. Step 5: Solve for x
   x = 1,035,145.89/1,088.01
6. Step 6: Final answer
   x = 951.41