Finding the Fourth Proportional to 2,845.98, 4,270.34 and 1,287.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,845.98 : 4,270.34 = 1,287.10 : x
2. Step 2: Convert to fraction form
   2,845.98/4,270.34 = 1,287.10/x
3. Step 3: Cross multiply
   2,845.98x = 4,270.34 × 1,287.10
4. Step 4: Simplify right side
   2,845.98x = 5,496,354.61
5. Step 5: Solve for x
   x = 5,496,354.61/2,845.98
6. Step 6: Final answer
   x = 1,931.27