Finding the Third Proportional to 139,433 and 215,445

Step by Step Solution

1. Step 1: Write the proportion equation
   139,433 : 215,445 = 215,445 : x
2. Step 2: Convert to fraction form
   139,433/215,445 = 215,445/x
3. Step 3: Cross multiply
   139,433x = 215,445 × 215,445
4. Step 4: Simplify right side
   139,433x = 46,416,548,025
5. Step 5: Solve for x
   x = 46,416,548,025/139,433
6. Step 6: Final answer
   x = 332,895.00