Finding the Fourth Proportional to 16,717.78, 23,070.59 and 9,648.30

Step by Step Solution

1. Step 1: Write the proportion equation
   16,717.78 : 23,070.59 = 9,648.30 : x
2. Step 2: Convert to fraction form
   16,717.78/23,070.59 = 9,648.30/x
3. Step 3: Cross multiply
   16,717.78x = 23,070.59 × 9,648.30
4. Step 4: Simplify right side
   16,717.78x = 222,591,973.50
5. Step 5: Solve for x
   x = 222,591,973.50/16,717.78
6. Step 6: Final answer
   x = 13,314.68