Finding the Third Proportional to 138,718.50 and 327,261

Step by Step Solution

1. Step 1: Write the proportion equation
   138,718.50 : 327,261 = 327,261 : x
2. Step 2: Convert to fraction form
   138,718.50/327,261 = 327,261/x
3. Step 3: Cross multiply
   138,718.50x = 327,261 × 327,261
4. Step 4: Simplify right side
   138,718.50x = 107,099,762,121
5. Step 5: Solve for x
   x = 107,099,762,121/138,718.50
6. Step 6: Final answer
   x = 772,065.46