Finding the Fourth Proportional to 21,938.29, 30,274.72 and 11,866.70

Step by Step Solution

1. Step 1: Write the proportion equation
   21,938.29 : 30,274.72 = 11,866.70 : x
2. Step 2: Convert to fraction form
   21,938.29/30,274.72 = 11,866.70/x
3. Step 3: Cross multiply
   21,938.29x = 30,274.72 × 11,866.70
4. Step 4: Simplify right side
   21,938.29x = 359,260,838.78
5. Step 5: Solve for x
   x = 359,260,838.78/21,938.29
6. Step 6: Final answer
   x = 16,375.97