Finding the Fourth Proportional to 2,615.48, 3,917.22 and 1,517.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,615.48 : 3,917.22 = 1,517.12 : x
2. Step 2: Convert to fraction form
   2,615.48/3,917.22 = 1,517.12/x
3. Step 3: Cross multiply
   2,615.48x = 3,917.22 × 1,517.12
4. Step 4: Simplify right side
   2,615.48x = 5,942,892.81
5. Step 5: Solve for x
   x = 5,942,892.81/2,615.48
6. Step 6: Final answer
   x = 2,272.20