Finding the Fourth Proportional to 11,938.28, 17,916.72 and 8,266.23

Step by Step Solution

1. Step 1: Write the proportion equation
   11,938.28 : 17,916.72 = 8,266.23 : x
2. Step 2: Convert to fraction form
   11,938.28/17,916.72 = 8,266.23/x
3. Step 3: Cross multiply
   11,938.28x = 17,916.72 × 8,266.23
4. Step 4: Simplify right side
   11,938.28x = 148,103,728.37
5. Step 5: Solve for x
   x = 148,103,728.37/11,938.28
6. Step 6: Final answer
   x = 12,405.79