Finding the Fourth Proportional to 13,065.48, 18,026.01 and 7,399.65

Step by Step Solution

1. Step 1: Write the proportion equation
   13,065.48 : 18,026.01 = 7,399.65 : x
2. Step 2: Convert to fraction form
   13,065.48/18,026.01 = 7,399.65/x
3. Step 3: Cross multiply
   13,065.48x = 18,026.01 × 7,399.65
4. Step 4: Simplify right side
   13,065.48x = 133,386,164.90
5. Step 5: Solve for x
   x = 133,386,164.90/13,065.48
6. Step 6: Final answer
   x = 10,209.05