Finding the Fourth Proportional to 22,688.48, 31,309.98 and 12,616.33

Step by Step Solution

1. Step 1: Write the proportion equation
   22,688.48 : 31,309.98 = 12,616.33 : x
2. Step 2: Convert to fraction form
   22,688.48/31,309.98 = 12,616.33/x
3. Step 3: Cross multiply
   22,688.48x = 31,309.98 × 12,616.33
4. Step 4: Simplify right side
   22,688.48x = 395,016,973.09
5. Step 5: Solve for x
   x = 395,016,973.09/22,688.48
6. Step 6: Final answer
   x = 17,410.47