Finding the Fourth Proportional to 22,290.24, 30,758.49 and 12,856.98

Step by Step Solution

1. Step 1: Write the proportion equation
   22,290.24 : 30,758.49 = 12,856.98 : x
2. Step 2: Convert to fraction form
   22,290.24/30,758.49 = 12,856.98/x
3. Step 3: Cross multiply
   22,290.24x = 30,758.49 × 12,856.98
4. Step 4: Simplify right side
   22,290.24x = 395,461,290.76
5. Step 5: Solve for x
   x = 395,461,290.76/22,290.24
6. Step 6: Final answer
   x = 17,741.46