Finding the Third Proportional to 171,716.50 and 377,688.50

Step by Step Solution

1. Step 1: Write the proportion equation
   171,716.50 : 377,688.50 = 377,688.50 : x
2. Step 2: Convert to fraction form
   171,716.50/377,688.50 = 377,688.50/x
3. Step 3: Cross multiply
   171,716.50x = 377,688.50 × 377,688.50
4. Step 4: Simplify right side
   171,716.50x = 142,648,603,032.25
5. Step 5: Solve for x
   x = 142,648,603,032.25/171,716.50
6. Step 6: Final answer
   x = 830,721.58