Finding the Third Proportional to 72,105 and 156,378

Step by Step Solution

1. Step 1: Write the proportion equation
   72,105 : 156,378 = 156,378 : x
2. Step 2: Convert to fraction form
   72,105/156,378 = 156,378/x
3. Step 3: Cross multiply
   72,105x = 156,378 × 156,378
4. Step 4: Simplify right side
   72,105x = 24,454,078,884
5. Step 5: Solve for x
   x = 24,454,078,884/72,105
6. Step 6: Final answer
   x = 339,145.40