Finding the Fourth Proportional to 13,301.76, 18,357.72 and 9,938.74

Step by Step Solution

1. Step 1: Write the proportion equation
   13,301.76 : 18,357.72 = 9,938.74 : x
2. Step 2: Convert to fraction form
   13,301.76/18,357.72 = 9,938.74/x
3. Step 3: Cross multiply
   13,301.76x = 18,357.72 × 9,938.74
4. Step 4: Simplify right side
   13,301.76x = 182,452,606.07
5. Step 5: Solve for x
   x = 182,452,606.07/13,301.76
6. Step 6: Final answer
   x = 13,716.43