Finding the Fourth Proportional to 1,061.39, 1,464.51 and 688.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.39 : 1,464.51 = 688.34 : x
2. Step 2: Convert to fraction form
   1,061.39/1,464.51 = 688.34/x
3. Step 3: Cross multiply
   1,061.39x = 1,464.51 × 688.34
4. Step 4: Simplify right side
   1,061.39x = 1,008,073.49
5. Step 5: Solve for x
   x = 1,008,073.49/1,061.39
6. Step 6: Final answer
   x = 949.77