Finding the Fourth Proportional to 2,615.38, 3,607.99 and 1,620.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,615.38 : 3,607.99 = 1,620.30 : x
2. Step 2: Convert to fraction form
   2,615.38/3,607.99 = 1,620.30/x
3. Step 3: Cross multiply
   2,615.38x = 3,607.99 × 1,620.30
4. Step 4: Simplify right side
   2,615.38x = 5,846,026.20
5. Step 5: Solve for x
   x = 5,846,026.20/2,615.38
6. Step 6: Final answer
   x = 2,235.25