Finding the Fourth Proportional to 21,898.30, 30,219.69 and 12,466.86

Step by Step Solution

1. Step 1: Write the proportion equation
   21,898.30 : 30,219.69 = 12,466.86 : x
2. Step 2: Convert to fraction form
   21,898.30/30,219.69 = 12,466.86/x
3. Step 3: Cross multiply
   21,898.30x = 30,219.69 × 12,466.86
4. Step 4: Simplify right side
   21,898.30x = 376,744,688.86
5. Step 5: Solve for x
   x = 376,744,688.86/21,898.30
6. Step 6: Final answer
   x = 17,204.29