Finding the Fourth Proportional to 22,186.62, 30,615 and 12,758.22

Step by Step Solution

1. Step 1: Write the proportion equation
   22,186.62 : 30,615 = 12,758.22 : x
2. Step 2: Convert to fraction form
   22,186.62/30,615 = 12,758.22/x
3. Step 3: Cross multiply
   22,186.62x = 30,615 × 12,758.22
4. Step 4: Simplify right side
   22,186.62x = 390,592,905.30
5. Step 5: Solve for x
   x = 390,592,905.30/22,186.62
6. Step 6: Final answer
   x = 17,604.89