Finding the Third Proportional to 8,618.91 and 12,196.51

Step by Step Solution

1. Step 1: Write the proportion equation
   8,618.91 : 12,196.51 = 12,196.51 : x
2. Step 2: Convert to fraction form
   8,618.91/12,196.51 = 12,196.51/x
3. Step 3: Cross multiply
   8,618.91x = 12,196.51 × 12,196.51
4. Step 4: Simplify right side
   8,618.91x = 148,754,898.11
5. Step 5: Solve for x
   x = 148,754,898.11/8,618.91
6. Step 6: Final answer
   x = 17,259.14