Finding the Third Proportional to 72,789 and 158,391

Step by Step Solution

1. Step 1: Write the proportion equation
   72,789 : 158,391 = 158,391 : x
2. Step 2: Convert to fraction form
   72,789/158,391 = 158,391/x
3. Step 3: Cross multiply
   72,789x = 158,391 × 158,391
4. Step 4: Simplify right side
   72,789x = 25,087,708,881
5. Step 5: Solve for x
   x = 25,087,708,881/72,789
6. Step 6: Final answer
   x = 344,663.46