Finding the Fourth Proportional to 1,065.96, 1,471.72 and 688.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,065.96 : 1,471.72 = 688.02 : x
2. Step 2: Convert to fraction form
   1,065.96/1,471.72 = 688.02/x
3. Step 3: Cross multiply
   1,065.96x = 1,471.72 × 688.02
4. Step 4: Simplify right side
   1,065.96x = 1,012,572.79
5. Step 5: Solve for x
   x = 1,012,572.79/1,065.96
6. Step 6: Final answer
   x = 949.92