Finding the Third Proportional to 11,920.25 and 18,871.25

Step by Step Solution

1. Step 1: Write the proportion equation
   11,920.25 : 18,871.25 = 18,871.25 : x
2. Step 2: Convert to fraction form
   11,920.25/18,871.25 = 18,871.25/x
3. Step 3: Cross multiply
   11,920.25x = 18,871.25 × 18,871.25
4. Step 4: Simplify right side
   11,920.25x = 356,124,076.56
5. Step 5: Solve for x
   x = 356,124,076.56/11,920.25
6. Step 6: Final answer
   x = 29,875.55