Finding the Fourth Proportional to 2,072.16, 3,106.38 and 838.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,072.16 : 3,106.38 = 838.92 : x
2. Step 2: Convert to fraction form
   2,072.16/3,106.38 = 838.92/x
3. Step 3: Cross multiply
   2,072.16x = 3,106.38 × 838.92
4. Step 4: Simplify right side
   2,072.16x = 2,606,004.31
5. Step 5: Solve for x
   x = 2,606,004.31/2,072.16
6. Step 6: Final answer
   x = 1,257.63