Finding the Third Proportional to 178,812 and 386,662.50

Step by Step Solution

1. Step 1: Write the proportion equation
   178,812 : 386,662.50 = 386,662.50 : x
2. Step 2: Convert to fraction form
   178,812/386,662.50 = 386,662.50/x
3. Step 3: Cross multiply
   178,812x = 386,662.50 × 386,662.50
4. Step 4: Simplify right side
   178,812x = 149,507,888,906.25
5. Step 5: Solve for x
   x = 149,507,888,906.25/178,812
6. Step 6: Final answer
   x = 836,117.76