Finding the Fourth Proportional to 1,066.64, 1,472.04 and 624.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,066.64 : 1,472.04 = 624.38 : x
2. Step 2: Convert to fraction form
   1,066.64/1,472.04 = 624.38/x
3. Step 3: Cross multiply
   1,066.64x = 1,472.04 × 624.38
4. Step 4: Simplify right side
   1,066.64x = 919,104.98
5. Step 5: Solve for x
   x = 919,104.98/1,066.64
6. Step 6: Final answer
   x = 861.69