Finding the Fourth Proportional to 21,785.87, 30,064.50 and 12,354.43

Step by Step Solution

1. Step 1: Write the proportion equation
   21,785.87 : 30,064.50 = 12,354.43 : x
2. Step 2: Convert to fraction form
   21,785.87/30,064.50 = 12,354.43/x
3. Step 3: Cross multiply
   21,785.87x = 30,064.50 × 12,354.43
4. Step 4: Simplify right side
   21,785.87x = 371,429,805.01
5. Step 5: Solve for x
   x = 371,429,805.01/21,785.87
6. Step 6: Final answer
   x = 17,049.12