Finding the Fourth Proportional to 2,285.72, 3,154.29 and 1,237.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,285.72 : 3,154.29 = 1,237.78 : x
2. Step 2: Convert to fraction form
   2,285.72/3,154.29 = 1,237.78/x
3. Step 3: Cross multiply
   2,285.72x = 3,154.29 × 1,237.78
4. Step 4: Simplify right side
   2,285.72x = 3,904,323.34
5. Step 5: Solve for x
   x = 3,904,323.34/2,285.72
6. Step 6: Final answer
   x = 1,708.14