Finding the Third Proportional to 139,371 and 212,332.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,371 : 212,332.50 = 212,332.50 : x
2. Step 2: Convert to fraction form
   139,371/212,332.50 = 212,332.50/x
3. Step 3: Cross multiply
   139,371x = 212,332.50 × 212,332.50
4. Step 4: Simplify right side
   139,371x = 45,085,090,556.25
5. Step 5: Solve for x
   x = 45,085,090,556.25/139,371
6. Step 6: Final answer
   x = 323,489.75