Finding the Third Proportional to 7,867.13 and 12,151.69

Step by Step Solution

1. Step 1: Write the proportion equation
   7,867.13 : 12,151.69 = 12,151.69 : x
2. Step 2: Convert to fraction form
   7,867.13/12,151.69 = 12,151.69/x
3. Step 3: Cross multiply
   7,867.13x = 12,151.69 × 12,151.69
4. Step 4: Simplify right side
   7,867.13x = 147,663,509.10
5. Step 5: Solve for x
   x = 147,663,509.10/7,867.13
6. Step 6: Final answer
   x = 18,769.69