Finding the Fourth Proportional to 1,051.02, 1,450.27 and 631.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,051.02 : 1,450.27 = 631.31 : x
2. Step 2: Convert to fraction form
   1,051.02/1,450.27 = 631.31/x
3. Step 3: Cross multiply
   1,051.02x = 1,450.27 × 631.31
4. Step 4: Simplify right side
   1,051.02x = 915,563.49
5. Step 5: Solve for x
   x = 915,563.49/1,051.02
6. Step 6: Final answer
   x = 871.12