Finding the Fourth Proportional to 2,013.78, 2,780.62 and 1,342.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,013.78 : 2,780.62 = 1,342.24 : x
2. Step 2: Convert to fraction form
   2,013.78/2,780.62 = 1,342.24/x
3. Step 3: Cross multiply
   2,013.78x = 2,780.62 × 1,342.24
4. Step 4: Simplify right side
   2,013.78x = 3,732,259.39
5. Step 5: Solve for x
   x = 3,732,259.39/2,013.78
6. Step 6: Final answer
   x = 1,853.36