Finding the Fourth Proportional to 1,074.96, 1,483.20 and 609.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,074.96 : 1,483.20 = 609.12 : x
2. Step 2: Convert to fraction form
   1,074.96/1,483.20 = 609.12/x
3. Step 3: Cross multiply
   1,074.96x = 1,483.20 × 609.12
4. Step 4: Simplify right side
   1,074.96x = 903,446.78
5. Step 5: Solve for x
   x = 903,446.78/1,074.96
6. Step 6: Final answer
   x = 840.45