Finding the Fourth Proportional to 22,320.09, 30,801.74 and 12,888.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,320.09 : 30,801.74 = 12,888.72 : x
2. Step 2: Convert to fraction form
   22,320.09/30,801.74 = 12,888.72/x
3. Step 3: Cross multiply
   22,320.09x = 30,801.74 × 12,888.72
4. Step 4: Simplify right side
   22,320.09x = 396,994,937.93
5. Step 5: Solve for x
   x = 396,994,937.93/22,320.09
6. Step 6: Final answer
   x = 17,786.44