Finding the Fourth Proportional to 1,047.69, 1,446.11 and 839.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,047.69 : 1,446.11 = 839.32 : x
2. Step 2: Convert to fraction form
   1,047.69/1,446.11 = 839.32/x
3. Step 3: Cross multiply
   1,047.69x = 1,446.11 × 839.32
4. Step 4: Simplify right side
   1,047.69x = 1,213,747.53
5. Step 5: Solve for x
   x = 1,213,747.53/1,047.69
6. Step 6: Final answer
   x = 1,158.50