Finding the Fourth Proportional to 2,071.34, 3,106.48 and 838.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.34 : 3,106.48 = 838.39 : x
2. Step 2: Convert to fraction form
   2,071.34/3,106.48 = 838.39/x
3. Step 3: Cross multiply
   2,071.34x = 3,106.48 × 838.39
4. Step 4: Simplify right side
   2,071.34x = 2,604,441.77
5. Step 5: Solve for x
   x = 2,604,441.77/2,071.34
6. Step 6: Final answer
   x = 1,257.37