Finding the Fourth Proportional to 13,082.18, 18,053.31 and 7,113.85

Step by Step Solution

1. Step 1: Write the proportion equation
   13,082.18 : 18,053.31 = 7,113.85 : x
2. Step 2: Convert to fraction form
   13,082.18/18,053.31 = 7,113.85/x
3. Step 3: Cross multiply
   13,082.18x = 18,053.31 × 7,113.85
4. Step 4: Simplify right side
   13,082.18x = 128,428,413.51
5. Step 5: Solve for x
   x = 128,428,413.51/13,082.18
6. Step 6: Final answer
   x = 9,817.05