Finding the Fourth Proportional to 2,013.69, 3,014.21 and 1,385.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,013.69 : 3,014.21 = 1,385.31 : x
2. Step 2: Convert to fraction form
   2,013.69/3,014.21 = 1,385.31/x
3. Step 3: Cross multiply
   2,013.69x = 3,014.21 × 1,385.31
4. Step 4: Simplify right side
   2,013.69x = 4,175,618.72
5. Step 5: Solve for x
   x = 4,175,618.72/2,013.69
6. Step 6: Final answer
   x = 2,073.62