Finding the Fourth Proportional to 22,009.76, 30,373.56 and 12,578.64

Step by Step Solution

1. Step 1: Write the proportion equation
   22,009.76 : 30,373.56 = 12,578.64 : x
2. Step 2: Convert to fraction form
   22,009.76/30,373.56 = 12,578.64/x
3. Step 3: Cross multiply
   22,009.76x = 30,373.56 × 12,578.64
4. Step 4: Simplify right side
   22,009.76x = 382,058,076.76
5. Step 5: Solve for x
   x = 382,058,076.76/22,009.76
6. Step 6: Final answer
   x = 17,358.58