Finding the Fourth Proportional to 13,109.82, 18,092.00 and 7,142.05

Step by Step Solution

1. Step 1: Write the proportion equation
   13,109.82 : 18,092.00 = 7,142.05 : x
2. Step 2: Convert to fraction form
   13,109.82/18,092.00 = 7,142.05/x
3. Step 3: Cross multiply
   13,109.82x = 18,092.00 × 7,142.05
4. Step 4: Simplify right side
   13,109.82x = 129,213,907.97
5. Step 5: Solve for x
   x = 129,213,907.97/13,109.82
6. Step 6: Final answer
   x = 9,856.27