Finding the Third Proportional to 138,444 and 216,892.50

Step by Step Solution

1. Step 1: Write the proportion equation
   138,444 : 216,892.50 = 216,892.50 : x
2. Step 2: Convert to fraction form
   138,444/216,892.50 = 216,892.50/x
3. Step 3: Cross multiply
   138,444x = 216,892.50 × 216,892.50
4. Step 4: Simplify right side
   138,444x = 47,042,356,556.25
5. Step 5: Solve for x
   x = 47,042,356,556.25/138,444
6. Step 6: Final answer
   x = 339,793.39