Finding the Fourth Proportional to 2,071.27, 3,107.36 and 838.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.27 : 3,107.36 = 838.50 : x
2. Step 2: Convert to fraction form
   2,071.27/3,107.36 = 838.50/x
3. Step 3: Cross multiply
   2,071.27x = 3,107.36 × 838.50
4. Step 4: Simplify right side
   2,071.27x = 2,605,529.28
5. Step 5: Solve for x
   x = 2,605,529.28/2,071.27
6. Step 6: Final answer
   x = 1,257.94