Finding the Fourth Proportional to 12,986.01, 17,919.18 and 7,320.33

Step by Step Solution

1. Step 1: Write the proportion equation
   12,986.01 : 17,919.18 = 7,320.33 : x
2. Step 2: Convert to fraction form
   12,986.01/17,919.18 = 7,320.33/x
3. Step 3: Cross multiply
   12,986.01x = 17,919.18 × 7,320.33
4. Step 4: Simplify right side
   12,986.01x = 131,174,310.93
5. Step 5: Solve for x
   x = 131,174,310.93/12,986.01
6. Step 6: Final answer
   x = 10,101.20