Finding the Fourth Proportional to 22,298.69, 30,767.38 and 12,861.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,298.69 : 30,767.38 = 12,861.78 : x
2. Step 2: Convert to fraction form
   22,298.69/30,767.38 = 12,861.78/x
3. Step 3: Cross multiply
   22,298.69x = 30,767.38 × 12,861.78
4. Step 4: Simplify right side
   22,298.69x = 395,723,208.43
5. Step 5: Solve for x
   x = 395,723,208.43/22,298.69
6. Step 6: Final answer
   x = 17,746.48