Finding the Third Proportional to 81,238.50 and 121,860

Step by Step Solution

1. Step 1: Write the proportion equation
   81,238.50 : 121,860 = 121,860 : x
2. Step 2: Convert to fraction form
   81,238.50/121,860 = 121,860/x
3. Step 3: Cross multiply
   81,238.50x = 121,860 × 121,860
4. Step 4: Simplify right side
   81,238.50x = 14,849,859,600
5. Step 5: Solve for x
   x = 14,849,859,600/81,238.50
6. Step 6: Final answer
   x = 182,793.38