Finding the Fourth Proportional to 22,243.72, 30,702.90 and 12,818.92

Step by Step Solution

1. Step 1: Write the proportion equation
   22,243.72 : 30,702.90 = 12,818.92 : x
2. Step 2: Convert to fraction form
   22,243.72/30,702.90 = 12,818.92/x
3. Step 3: Cross multiply
   22,243.72x = 30,702.90 × 12,818.92
4. Step 4: Simplify right side
   22,243.72x = 393,578,018.87
5. Step 5: Solve for x
   x = 393,578,018.87/22,243.72
6. Step 6: Final answer
   x = 17,693.89