Finding the Third Proportional to 171,976.50 and 351,607.50

Step by Step Solution

1. Step 1: Write the proportion equation
   171,976.50 : 351,607.50 = 351,607.50 : x
2. Step 2: Convert to fraction form
   171,976.50/351,607.50 = 351,607.50/x
3. Step 3: Cross multiply
   171,976.50x = 351,607.50 × 351,607.50
4. Step 4: Simplify right side
   171,976.50x = 123,627,834,056.25
5. Step 5: Solve for x
   x = 123,627,834,056.25/171,976.50
6. Step 6: Final answer
   x = 718,864.69