Finding the Fourth Proportional to 10,938.21, 15,105.08 and 8,716.43

Step by Step Solution

1. Step 1: Write the proportion equation
   10,938.21 : 15,105.08 = 8,716.43 : x
2. Step 2: Convert to fraction form
   10,938.21/15,105.08 = 8,716.43/x
3. Step 3: Cross multiply
   10,938.21x = 15,105.08 × 8,716.43
4. Step 4: Simplify right side
   10,938.21x = 131,662,347.05
5. Step 5: Solve for x
   x = 131,662,347.05/10,938.21
6. Step 6: Final answer
   x = 12,036.92