Finding the Fourth Proportional to 1,050.42, 1,449.69 and 608.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,050.42 : 1,449.69 = 608.31 : x
2. Step 2: Convert to fraction form
   1,050.42/1,449.69 = 608.31/x
3. Step 3: Cross multiply
   1,050.42x = 1,449.69 × 608.31
4. Step 4: Simplify right side
   1,050.42x = 881,860.92
5. Step 5: Solve for x
   x = 881,860.92/1,050.42
6. Step 6: Final answer
   x = 839.53