Finding the Third Proportional to 177,812 and 386,150

Step by Step Solution

1. Step 1: Write the proportion equation
   177,812 : 386,150 = 386,150 : x
2. Step 2: Convert to fraction form
   177,812/386,150 = 386,150/x
3. Step 3: Cross multiply
   177,812x = 386,150 × 386,150
4. Step 4: Simplify right side
   177,812x = 149,111,822,500
5. Step 5: Solve for x
   x = 149,111,822,500/177,812
6. Step 6: Final answer
   x = 838,592.57