Finding the Fourth Proportional to 22,809.84, 31,477.28 and 12,738.46

Step by Step Solution

1. Step 1: Write the proportion equation
   22,809.84 : 31,477.28 = 12,738.46 : x
2. Step 2: Convert to fraction form
   22,809.84/31,477.28 = 12,738.46/x
3. Step 3: Cross multiply
   22,809.84x = 31,477.28 × 12,738.46
4. Step 4: Simplify right side
   22,809.84x = 400,972,008.50
5. Step 5: Solve for x
   x = 400,972,008.50/22,809.84
6. Step 6: Final answer
   x = 17,578.91