Finding the Fourth Proportional to 1,050.57, 1,449.73 and 630.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,050.57 : 1,449.73 = 630.83 : x
2. Step 2: Convert to fraction form
   1,050.57/1,449.73 = 630.83/x
3. Step 3: Cross multiply
   1,050.57x = 1,449.73 × 630.83
4. Step 4: Simplify right side
   1,050.57x = 914,533.18
5. Step 5: Solve for x
   x = 914,533.18/1,050.57
6. Step 6: Final answer
   x = 870.51