Finding the Fourth Proportional to 1,092.72, 1,640.52 and 630.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,092.72 : 1,640.52 = 630.96 : x
2. Step 2: Convert to fraction form
   1,092.72/1,640.52 = 630.96/x
3. Step 3: Cross multiply
   1,092.72x = 1,640.52 × 630.96
4. Step 4: Simplify right side
   1,092.72x = 1,035,102.50
5. Step 5: Solve for x
   x = 1,035,102.50/1,092.72
6. Step 6: Final answer
   x = 947.27