Finding the Third Proportional to 12,112.88 and 18,739.69

Step by Step Solution

1. Step 1: Write the proportion equation
   12,112.88 : 18,739.69 = 18,739.69 : x
2. Step 2: Convert to fraction form
   12,112.88/18,739.69 = 18,739.69/x
3. Step 3: Cross multiply
   12,112.88x = 18,739.69 × 18,739.69
4. Step 4: Simplify right side
   12,112.88x = 351,175,887.60
5. Step 5: Solve for x
   x = 351,175,887.60/12,112.88
6. Step 6: Final answer
   x = 28,991.95