Finding the Third Proportional to 66,996 and 139,506

Step by Step Solution

1. Step 1: Write the proportion equation
   66,996 : 139,506 = 139,506 : x
2. Step 2: Convert to fraction form
   66,996/139,506 = 139,506/x
3. Step 3: Cross multiply
   66,996x = 139,506 × 139,506
4. Step 4: Simplify right side
   66,996x = 19,461,924,036
5. Step 5: Solve for x
   x = 19,461,924,036/66,996
6. Step 6: Final answer
   x = 290,493.82