Finding the Fourth Proportional to 22,181.40, 30,613.42 and 12,749.76

Step by Step Solution

1. Step 1: Write the proportion equation
   22,181.40 : 30,613.42 = 12,749.76 : x
2. Step 2: Convert to fraction form
   22,181.40/30,613.42 = 12,749.76/x
3. Step 3: Cross multiply
   22,181.40x = 30,613.42 × 12,749.76
4. Step 4: Simplify right side
   22,181.40x = 390,313,757.78
5. Step 5: Solve for x
   x = 390,313,757.78/22,181.40
6. Step 6: Final answer
   x = 17,596.44