Finding the Fourth Proportional to 1,050.45, 1,449.30 and 608.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,050.45 : 1,449.30 = 608.30 : x
2. Step 2: Convert to fraction form
   1,050.45/1,449.30 = 608.30/x
3. Step 3: Cross multiply
   1,050.45x = 1,449.30 × 608.30
4. Step 4: Simplify right side
   1,050.45x = 881,601.94
5. Step 5: Solve for x
   x = 881,601.94/1,050.45
6. Step 6: Final answer
   x = 839.26