Finding the Fourth Proportional to 2,070.72, 3,106.23 and 838.14

Step by Step Solution

1. Step 1: Write the proportion equation
   2,070.72 : 3,106.23 = 838.14 : x
2. Step 2: Convert to fraction form
   2,070.72/3,106.23 = 838.14/x
3. Step 3: Cross multiply
   2,070.72x = 3,106.23 × 838.14
4. Step 4: Simplify right side
   2,070.72x = 2,603,455.61
5. Step 5: Solve for x
   x = 2,603,455.61/2,070.72
6. Step 6: Final answer
   x = 1,257.27