Finding the Third Proportional to 67,298,431 and 146,406,663

Step by Step Solution

1. Step 1: Write the proportion equation
   67,298,431 : 146,406,663 = 146,406,663 : x
2. Step 2: Convert to fraction form
   67,298,431/146,406,663 = 146,406,663/x
3. Step 3: Cross multiply
   67,298,431x = 146,406,663 × 146,406,663
4. Step 4: Simplify right side
   67,298,431x = 21,434,910,970,795,568
5. Step 5: Solve for x
   x = 21,434,910,970,795,568/67,298,431
6. Step 6: Final answer
   x = 318,505,359.67