Finding the Fourth Proportional to 1,050.73, 1,449.90 and 608.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,050.73 : 1,449.90 = 608.78 : x
2. Step 2: Convert to fraction form
   1,050.73/1,449.90 = 608.78/x
3. Step 3: Cross multiply
   1,050.73x = 1,449.90 × 608.78
4. Step 4: Simplify right side
   1,050.73x = 882,662.87
5. Step 5: Solve for x
   x = 882,662.87/1,050.73
6. Step 6: Final answer
   x = 840.05