Finding the Fourth Proportional to 1,066.96, 1,472.56 and 624.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,066.96 : 1,472.56 = 624.80 : x
2. Step 2: Convert to fraction form
   1,066.96/1,472.56 = 624.80/x
3. Step 3: Cross multiply
   1,066.96x = 1,472.56 × 624.80
4. Step 4: Simplify right side
   1,066.96x = 920,055.49
5. Step 5: Solve for x
   x = 920,055.49/1,066.96
6. Step 6: Final answer
   x = 862.31