Finding the Fourth Proportional to 1,050.42, 1,449.06 and 630.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,050.42 : 1,449.06 = 630.57 : x
2. Step 2: Convert to fraction form
   1,050.42/1,449.06 = 630.57/x
3. Step 3: Cross multiply
   1,050.42x = 1,449.06 × 630.57
4. Step 4: Simplify right side
   1,050.42x = 913,733.76
5. Step 5: Solve for x
   x = 913,733.76/1,050.42
6. Step 6: Final answer
   x = 869.87