Finding the Fourth Proportional to 1,074.81, 1,483.19 and 609.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,074.81 : 1,483.19 = 609.05 : x
2. Step 2: Convert to fraction form
   1,074.81/1,483.19 = 609.05/x
3. Step 3: Cross multiply
   1,074.81x = 1,483.19 × 609.05
4. Step 4: Simplify right side
   1,074.81x = 903,333.82
5. Step 5: Solve for x
   x = 903,333.82/1,074.81
6. Step 6: Final answer
   x = 840.46