Finding the Fourth Proportional to 1,066.56, 1,471.92 and 624.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,066.56 : 1,471.92 = 624.96 : x
2. Step 2: Convert to fraction form
   1,066.56/1,471.92 = 624.96/x
3. Step 3: Cross multiply
   1,066.56x = 1,471.92 × 624.96
4. Step 4: Simplify right side
   1,066.56x = 919,891.12
5. Step 5: Solve for x
   x = 919,891.12/1,066.56
6. Step 6: Final answer
   x = 862.48