Finding the Fourth Proportional to 1,066.56, 1,471.80 and 624.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,066.56 : 1,471.80 = 624.48 : x
2. Step 2: Convert to fraction form
   1,066.56/1,471.80 = 624.48/x
3. Step 3: Cross multiply
   1,066.56x = 1,471.80 × 624.48
4. Step 4: Simplify right side
   1,066.56x = 919,109.66
5. Step 5: Solve for x
   x = 919,109.66/1,066.56
6. Step 6: Final answer
   x = 861.75