Finding the Fourth Proportional to 1,066.36, 1,471.98 and 624.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,066.36 : 1,471.98 = 624.40 : x
2. Step 2: Convert to fraction form
   1,066.36/1,471.98 = 624.40/x
3. Step 3: Cross multiply
   1,066.36x = 1,471.98 × 624.40
4. Step 4: Simplify right side
   1,066.36x = 919,105.65
5. Step 5: Solve for x
   x = 919,105.65/1,066.36
6. Step 6: Final answer
   x = 861.91