Finding the Fourth Proportional to 962.82, 1,328.61 and 630.72

Step by Step Solution

1. Step 1: Write the proportion equation
   962.82 : 1,328.61 = 630.72 : x
2. Step 2: Convert to fraction form
   962.82/1,328.61 = 630.72/x
3. Step 3: Cross multiply
   962.82x = 1,328.61 × 630.72
4. Step 4: Simplify right side
   962.82x = 837,980.90
5. Step 5: Solve for x
   x = 837,980.90/962.82
6. Step 6: Final answer
   x = 870.34