Finding the Fourth Proportional to 22,260.78, 30,719.59 and 12,700.42

Step by Step Solution

1. Step 1: Write the proportion equation
   22,260.78 : 30,719.59 = 12,700.42 : x
2. Step 2: Convert to fraction form
   22,260.78/30,719.59 = 12,700.42/x
3. Step 3: Cross multiply
   22,260.78x = 30,719.59 × 12,700.42
4. Step 4: Simplify right side
   22,260.78x = 390,151,586.68
5. Step 5: Solve for x
   x = 390,151,586.68/22,260.78
6. Step 6: Final answer
   x = 17,526.41