Finding the Fourth Proportional to 2,071.69, 3,107.50 and 839.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.69 : 3,107.50 = 839.08 : x
2. Step 2: Convert to fraction form
   2,071.69/3,107.50 = 839.08/x
3. Step 3: Cross multiply
   2,071.69x = 3,107.50 × 839.08
4. Step 4: Simplify right side
   2,071.69x = 2,607,441.10
5. Step 5: Solve for x
   x = 2,607,441.10/2,071.69
6. Step 6: Final answer
   x = 1,258.61