Finding the Fourth Proportional to 1,073.46, 1,481.27 and 631.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,073.46 : 1,481.27 = 631.20 : x
2. Step 2: Convert to fraction form
   1,073.46/1,481.27 = 631.20/x
3. Step 3: Cross multiply
   1,073.46x = 1,481.27 × 631.20
4. Step 4: Simplify right side
   1,073.46x = 934,980.02
5. Step 5: Solve for x
   x = 934,980.02/1,073.46
6. Step 6: Final answer
   x = 870.99