Finding the Fourth Proportional to 3,664.96, 5,052.72 and 2,615.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,664.96 : 5,052.72 = 2,615.20 : x
2. Step 2: Convert to fraction form
   3,664.96/5,052.72 = 2,615.20/x
3. Step 3: Cross multiply
   3,664.96x = 5,052.72 × 2,615.20
4. Step 4: Simplify right side
   3,664.96x = 13,213,873.34
5. Step 5: Solve for x
   x = 13,213,873.34/3,664.96
6. Step 6: Final answer
   x = 3,605.46