Finding the Third Proportional to 139,412 and 305,506

Step by Step Solution

1. Step 1: Write the proportion equation
   139,412 : 305,506 = 305,506 : x
2. Step 2: Convert to fraction form
   139,412/305,506 = 305,506/x
3. Step 3: Cross multiply
   139,412x = 305,506 × 305,506
4. Step 4: Simplify right side
   139,412x = 93,333,916,036
5. Step 5: Solve for x
   x = 93,333,916,036/139,412
6. Step 6: Final answer
   x = 669,482.66