Finding the Fourth Proportional to 1,051.29, 1,450.71 and 631.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,051.29 : 1,450.71 = 631.71 : x
2. Step 2: Convert to fraction form
   1,051.29/1,450.71 = 631.71/x
3. Step 3: Cross multiply
   1,051.29x = 1,450.71 × 631.71
4. Step 4: Simplify right side
   1,051.29x = 916,428.01
5. Step 5: Solve for x
   x = 916,428.01/1,051.29
6. Step 6: Final answer
   x = 871.72