Finding the Fourth Proportional to 22,238.64, 30,681.12 and 12,805.32

Step by Step Solution

1. Step 1: Write the proportion equation
   22,238.64 : 30,681.12 = 12,805.32 : x
2. Step 2: Convert to fraction form
   22,238.64/30,681.12 = 12,805.32/x
3. Step 3: Cross multiply
   22,238.64x = 30,681.12 × 12,805.32
4. Step 4: Simplify right side
   22,238.64x = 392,881,559.56
5. Step 5: Solve for x
   x = 392,881,559.56/22,238.64
6. Step 6: Final answer
   x = 17,666.62