Finding the Third Proportional to 12,309.47 and 19,493.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,309.47 : 19,493.16 = 19,493.16 : x
2. Step 2: Convert to fraction form
   12,309.47/19,493.16 = 19,493.16/x
3. Step 3: Cross multiply
   12,309.47x = 19,493.16 × 19,493.16
4. Step 4: Simplify right side
   12,309.47x = 379,983,140.59
5. Step 5: Solve for x
   x = 379,983,140.59/12,309.47
6. Step 6: Final answer
   x = 30,869.17