Finding the Fourth Proportional to 1,074.84, 1,483.31 and 839.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,074.84 : 1,483.31 = 839.06 : x
2. Step 2: Convert to fraction form
   1,074.84/1,483.31 = 839.06/x
3. Step 3: Cross multiply
   1,074.84x = 1,483.31 × 839.06
4. Step 4: Simplify right side
   1,074.84x = 1,244,586.33
5. Step 5: Solve for x
   x = 1,244,586.33/1,074.84
6. Step 6: Final answer
   x = 1,157.92