Finding the Fourth Proportional to 13,083.76, 18,055.20 and 7,419.05

Step by Step Solution

1. Step 1: Write the proportion equation
   13,083.76 : 18,055.20 = 7,419.05 : x
2. Step 2: Convert to fraction form
   13,083.76/18,055.20 = 7,419.05/x
3. Step 3: Cross multiply
   13,083.76x = 18,055.20 × 7,419.05
4. Step 4: Simplify right side
   13,083.76x = 133,952,431.56
5. Step 5: Solve for x
   x = 133,952,431.56/13,083.76
6. Step 6: Final answer
   x = 10,238.07