Finding the Fourth Proportional to 21,758.58, 30,028.50 and 12,199.34

Step by Step Solution

1. Step 1: Write the proportion equation
   21,758.58 : 30,028.50 = 12,199.34 : x
2. Step 2: Convert to fraction form
   21,758.58/30,028.50 = 12,199.34/x
3. Step 3: Cross multiply
   21,758.58x = 30,028.50 × 12,199.34
4. Step 4: Simplify right side
   21,758.58x = 366,327,956.26
5. Step 5: Solve for x
   x = 366,327,956.26/21,758.58
6. Step 6: Final answer
   x = 16,836.02