Finding the Third Proportional to 141,653 and 309,442

Step by Step Solution

1. Step 1: Write the proportion equation
   141,653 : 309,442 = 309,442 : x
2. Step 2: Convert to fraction form
   141,653/309,442 = 309,442/x
3. Step 3: Cross multiply
   141,653x = 309,442 × 309,442
4. Step 4: Simplify right side
   141,653x = 95,754,351,364
5. Step 5: Solve for x
   x = 95,754,351,364/141,653
6. Step 6: Final answer
   x = 675,978.28