Finding the Third Proportional to 177,520.50 and 386,145

Step by Step Solution

1. Step 1: Write the proportion equation
   177,520.50 : 386,145 = 386,145 : x
2. Step 2: Convert to fraction form
   177,520.50/386,145 = 386,145/x
3. Step 3: Cross multiply
   177,520.50x = 386,145 × 386,145
4. Step 4: Simplify right side
   177,520.50x = 149,107,961,025
5. Step 5: Solve for x
   x = 149,107,961,025/177,520.50
6. Step 6: Final answer
   x = 839,947.84