Finding the Fourth Proportional to 2,227.15, 3,337.76 and 838.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,227.15 : 3,337.76 = 838.86 : x
2. Step 2: Convert to fraction form
   2,227.15/3,337.76 = 838.86/x
3. Step 3: Cross multiply
   2,227.15x = 3,337.76 × 838.86
4. Step 4: Simplify right side
   2,227.15x = 2,799,898.22
5. Step 5: Solve for x
   x = 2,799,898.22/2,227.15
6. Step 6: Final answer
   x = 1,257.17