Finding the Third Proportional to 138,924 and 215,250

Step by Step Solution

1. Step 1: Write the proportion equation
   138,924 : 215,250 = 215,250 : x
2. Step 2: Convert to fraction form
   138,924/215,250 = 215,250/x
3. Step 3: Cross multiply
   138,924x = 215,250 × 215,250
4. Step 4: Simplify right side
   138,924x = 46,332,562,500
5. Step 5: Solve for x
   x = 46,332,562,500/138,924
6. Step 6: Final answer
   x = 333,510.14