Finding the Third Proportional to 159,434 and 243,389

Step by Step Solution

1. Step 1: Write the proportion equation
   159,434 : 243,389 = 243,389 : x
2. Step 2: Convert to fraction form
   159,434/243,389 = 243,389/x
3. Step 3: Cross multiply
   159,434x = 243,389 × 243,389
4. Step 4: Simplify right side
   159,434x = 59,238,205,321
5. Step 5: Solve for x
   x = 59,238,205,321/159,434
6. Step 6: Final answer
   x = 371,553.15