Finding the Fourth Proportional to 1,061.35, 1,464.18 and 688.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.35 : 1,464.18 = 688.45 : x
2. Step 2: Convert to fraction form
   1,061.35/1,464.18 = 688.45/x
3. Step 3: Cross multiply
   1,061.35x = 1,464.18 × 688.45
4. Step 4: Simplify right side
   1,061.35x = 1,008,014.72
5. Step 5: Solve for x
   x = 1,008,014.72/1,061.35
6. Step 6: Final answer
   x = 949.75