Finding the Fourth Proportional to 1,066.92, 1,472.28 and 624.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,066.92 : 1,472.28 = 624.72 : x
2. Step 2: Convert to fraction form
   1,066.92/1,472.28 = 624.72/x
3. Step 3: Cross multiply
   1,066.92x = 1,472.28 × 624.72
4. Step 4: Simplify right side
   1,066.92x = 919,762.76
5. Step 5: Solve for x
   x = 919,762.76/1,066.92
6. Step 6: Final answer
   x = 862.07