Finding the Fourth Proportional to 1,067.25, 1,471.50 and 688.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,067.25 : 1,471.50 = 688.50 : x
2. Step 2: Convert to fraction form
   1,067.25/1,471.50 = 688.50/x
3. Step 3: Cross multiply
   1,067.25x = 1,471.50 × 688.50
4. Step 4: Simplify right side
   1,067.25x = 1,013,127.75
5. Step 5: Solve for x
   x = 1,013,127.75/1,067.25
6. Step 6: Final answer
   x = 949.29