Finding the Fourth Proportional to 2,425.07, 3,638.12 and 1,385.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,425.07 : 3,638.12 = 1,385.57 : x
2. Step 2: Convert to fraction form
   2,425.07/3,638.12 = 1,385.57/x
3. Step 3: Cross multiply
   2,425.07x = 3,638.12 × 1,385.57
4. Step 4: Simplify right side
   2,425.07x = 5,040,844.81
5. Step 5: Solve for x
   x = 5,040,844.81/2,425.07
6. Step 6: Final answer
   x = 2,078.64