Finding the Fourth Proportional to 1,074.88, 1,483.61 and 609.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,074.88 : 1,483.61 = 609.40 : x
2. Step 2: Convert to fraction form
   1,074.88/1,483.61 = 609.40/x
3. Step 3: Cross multiply
   1,074.88x = 1,483.61 × 609.40
4. Step 4: Simplify right side
   1,074.88x = 904,101.47
5. Step 5: Solve for x
   x = 904,101.47/1,074.88
6. Step 6: Final answer
   x = 841.12