Finding the Fourth Proportional to 1,061.57, 1,464.67 and 688.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.57 : 1,464.67 = 688.57 : x
2. Step 2: Convert to fraction form
   1,061.57/1,464.67 = 688.57/x
3. Step 3: Cross multiply
   1,061.57x = 1,464.67 × 688.57
4. Step 4: Simplify right side
   1,061.57x = 1,008,527.82
5. Step 5: Solve for x
   x = 1,008,527.82/1,061.57
6. Step 6: Final answer
   x = 950.03