Finding the Fourth Proportional to 1,050.51, 1,449.49 and 630.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,050.51 : 1,449.49 = 630.75 : x
2. Step 2: Convert to fraction form
   1,050.51/1,449.49 = 630.75/x
3. Step 3: Cross multiply
   1,050.51x = 1,449.49 × 630.75
4. Step 4: Simplify right side
   1,050.51x = 914,265.82
5. Step 5: Solve for x
   x = 914,265.82/1,050.51
6. Step 6: Final answer
   x = 870.31