Finding the Fourth Proportional to 1,066.62, 1,471.67 and 624.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,066.62 : 1,471.67 = 624.43 : x
2. Step 2: Convert to fraction form
   1,066.62/1,471.67 = 624.43/x
3. Step 3: Cross multiply
   1,066.62x = 1,471.67 × 624.43
4. Step 4: Simplify right side
   1,066.62x = 918,960.10
5. Step 5: Solve for x
   x = 918,960.10/1,066.62
6. Step 6: Final answer
   x = 861.56