Finding the Fourth Proportional to 1,800.72, 2,701.49 and 630.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,800.72 : 2,701.49 = 630.78 : x
2. Step 2: Convert to fraction form
   1,800.72/2,701.49 = 630.78/x
3. Step 3: Cross multiply
   1,800.72x = 2,701.49 × 630.78
4. Step 4: Simplify right side
   1,800.72x = 1,704,045.86
5. Step 5: Solve for x
   x = 1,704,045.86/1,800.72
6. Step 6: Final answer
   x = 946.31