Finding the Fourth Proportional to 1,051.88, 1,451.43 and 631.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,051.88 : 1,451.43 = 631.94 : x
2. Step 2: Convert to fraction form
   1,051.88/1,451.43 = 631.94/x
3. Step 3: Cross multiply
   1,051.88x = 1,451.43 × 631.94
4. Step 4: Simplify right side
   1,051.88x = 917,209.42
5. Step 5: Solve for x
   x = 917,209.42/1,051.88
6. Step 6: Final answer
   x = 871.98