Finding the Fourth Proportional to 13,300.68, 18,334.80 and 10,938.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,300.68 : 18,334.80 = 10,938.72 : x
2. Step 2: Convert to fraction form
   13,300.68/18,334.80 = 10,938.72/x
3. Step 3: Cross multiply
   13,300.68x = 18,334.80 × 10,938.72
4. Step 4: Simplify right side
   13,300.68x = 200,559,243.46
5. Step 5: Solve for x
   x = 200,559,243.46/13,300.68
6. Step 6: Final answer
   x = 15,078.87