Finding the Fourth Proportional to 22,298.51, 30,771.69 and 12,866.87

Step by Step Solution

1. Step 1: Write the proportion equation
   22,298.51 : 30,771.69 = 12,866.87 : x
2. Step 2: Convert to fraction form
   22,298.51/30,771.69 = 12,866.87/x
3. Step 3: Cross multiply
   22,298.51x = 30,771.69 × 12,866.87
4. Step 4: Simplify right side
   22,298.51x = 395,935,334.91
5. Step 5: Solve for x
   x = 395,935,334.91/22,298.51
6. Step 6: Final answer
   x = 17,756.13