Finding the Fourth Proportional to 2,070.56, 3,105.60 and 838.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,070.56 : 3,105.60 = 838.52 : x
2. Step 2: Convert to fraction form
   2,070.56/3,105.60 = 838.52/x
3. Step 3: Cross multiply
   2,070.56x = 3,105.60 × 838.52
4. Step 4: Simplify right side
   2,070.56x = 2,604,107.71
5. Step 5: Solve for x
   x = 2,604,107.71/2,070.56
6. Step 6: Final answer
   x = 1,257.68