Finding the Fourth Proportional to 22,235.34, 30,688.56 and 12,809.38

Step by Step Solution

1. Step 1: Write the proportion equation
   22,235.34 : 30,688.56 = 12,809.38 : x
2. Step 2: Convert to fraction form
   22,235.34/30,688.56 = 12,809.38/x
3. Step 3: Cross multiply
   22,235.34x = 30,688.56 × 12,809.38
4. Step 4: Simplify right side
   22,235.34x = 393,101,426.69
5. Step 5: Solve for x
   x = 393,101,426.69/22,235.34
6. Step 6: Final answer
   x = 17,679.13