Finding the Fourth Proportional to 2,142.48, 3,215.54 and 844.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.48 : 3,215.54 = 844.86 : x
2. Step 2: Convert to fraction form
   2,142.48/3,215.54 = 844.86/x
3. Step 3: Cross multiply
   2,142.48x = 3,215.54 × 844.86
4. Step 4: Simplify right side
   2,142.48x = 2,716,681.12
5. Step 5: Solve for x
   x = 2,716,681.12/2,142.48
6. Step 6: Final answer
   x = 1,268.01