Finding the Fourth Proportional to 2,620.40, 3,615.42 and 1,625.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,620.40 : 3,615.42 = 1,625.72 : x
2. Step 2: Convert to fraction form
   2,620.40/3,615.42 = 1,625.72/x
3. Step 3: Cross multiply
   2,620.40x = 3,615.42 × 1,625.72
4. Step 4: Simplify right side
   2,620.40x = 5,877,660.60
5. Step 5: Solve for x
   x = 5,877,660.60/2,620.40
6. Step 6: Final answer
   x = 2,243.04