Finding the Fourth Proportional to 22,058.32, 30,438 and 12,628.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,058.32 : 30,438 = 12,628.72 : x
2. Step 2: Convert to fraction form
   22,058.32/30,438 = 12,628.72/x
3. Step 3: Cross multiply
   22,058.32x = 30,438 × 12,628.72
4. Step 4: Simplify right side
   22,058.32x = 384,392,979.36
5. Step 5: Solve for x
   x = 384,392,979.36/22,058.32
6. Step 6: Final answer
   x = 17,426.21