Finding the Fourth Proportional to 22,247.48, 30,704.16 and 12,815.84

Step by Step Solution

1. Step 1: Write the proportion equation
   22,247.48 : 30,704.16 = 12,815.84 : x
2. Step 2: Convert to fraction form
   22,247.48/30,704.16 = 12,815.84/x
3. Step 3: Cross multiply
   22,247.48x = 30,704.16 × 12,815.84
4. Step 4: Simplify right side
   22,247.48x = 393,499,601.89
5. Step 5: Solve for x
   x = 393,499,601.89/22,247.48
6. Step 6: Final answer
   x = 17,687.38