Finding the Fourth Proportional to 1,051.71, 1,451.31 and 631.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,051.71 : 1,451.31 = 631.83 : x
2. Step 2: Convert to fraction form
   1,051.71/1,451.31 = 631.83/x
3. Step 3: Cross multiply
   1,051.71x = 1,451.31 × 631.83
4. Step 4: Simplify right side
   1,051.71x = 916,981.20
5. Step 5: Solve for x
   x = 916,981.20/1,051.71
6. Step 6: Final answer
   x = 871.90