Finding the Fourth Proportional to 1,051.89, 1,451.70 and 632.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,051.89 : 1,451.70 = 632.31 : x
2. Step 2: Convert to fraction form
   1,051.89/1,451.70 = 632.31/x
3. Step 3: Cross multiply
   1,051.89x = 1,451.70 × 632.31
4. Step 4: Simplify right side
   1,051.89x = 917,924.43
5. Step 5: Solve for x
   x = 917,924.43/1,051.89
6. Step 6: Final answer
   x = 872.64