Finding the Fourth Proportional to 13,073.88, 18,041.21 and 7,105.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,073.88 : 18,041.21 = 7,105.50 : x
2. Step 2: Convert to fraction form
   13,073.88/18,041.21 = 7,105.50/x
3. Step 3: Cross multiply
   13,073.88x = 18,041.21 × 7,105.50
4. Step 4: Simplify right side
   13,073.88x = 128,191,738.05
5. Step 5: Solve for x
   x = 128,191,738.05/13,073.88
6. Step 6: Final answer
   x = 9,805.18