Finding the Third Proportional to 72,860 and 156,380

Step by Step Solution

1. Step 1: Write the proportion equation
   72,860 : 156,380 = 156,380 : x
2. Step 2: Convert to fraction form
   72,860/156,380 = 156,380/x
3. Step 3: Cross multiply
   72,860x = 156,380 × 156,380
4. Step 4: Simplify right side
   72,860x = 24,454,704,400
5. Step 5: Solve for x
   x = 24,454,704,400/72,860
6. Step 6: Final answer
   x = 335,639.64