Finding the Fourth Proportional to 1,086.46, 1,625.62 and 646.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.46 : 1,625.62 = 646.10 : x
2. Step 2: Convert to fraction form
   1,086.46/1,625.62 = 646.10/x
3. Step 3: Cross multiply
   1,086.46x = 1,625.62 × 646.10
4. Step 4: Simplify right side
   1,086.46x = 1,050,309.85
5. Step 5: Solve for x
   x = 1,050,309.85/1,086.46
6. Step 6: Final answer
   x = 966.73