Finding the Fourth Proportional to 21,788.88, 30,064.20 and 12,354.96

Step by Step Solution

1. Step 1: Write the proportion equation
   21,788.88 : 30,064.20 = 12,354.96 : x
2. Step 2: Convert to fraction form
   21,788.88/30,064.20 = 12,354.96/x
3. Step 3: Cross multiply
   21,788.88x = 30,064.20 × 12,354.96
4. Step 4: Simplify right side
   21,788.88x = 371,441,988.43
5. Step 5: Solve for x
   x = 371,441,988.43/21,788.88
6. Step 6: Final answer
   x = 17,047.32