Finding the Fourth Proportional to 17,103.30, 25,652.39 and 5,415

Step by Step Solution

1. Step 1: Write the proportion equation
   17,103.30 : 25,652.39 = 5,415 : x
2. Step 2: Convert to fraction form
   17,103.30/25,652.39 = 5,415/x
3. Step 3: Cross multiply
   17,103.30x = 25,652.39 × 5,415
4. Step 4: Simplify right side
   17,103.30x = 138,907,664.78
5. Step 5: Solve for x
   x = 138,907,664.78/17,103.30
6. Step 6: Final answer
   x = 8,121.69