Finding the Third Proportional to 139,432.50 and 305,595

Step by Step Solution

1. Step 1: Write the proportion equation
   139,432.50 : 305,595 = 305,595 : x
2. Step 2: Convert to fraction form
   139,432.50/305,595 = 305,595/x
3. Step 3: Cross multiply
   139,432.50x = 305,595 × 305,595
4. Step 4: Simplify right side
   139,432.50x = 93,388,304,025
5. Step 5: Solve for x
   x = 93,388,304,025/139,432.50
6. Step 6: Final answer
   x = 669,774.29