Finding the Third Proportional to 388,087.50 and 848,311.50

Step by Step Solution

1. Step 1: Write the proportion equation
   388,087.50 : 848,311.50 = 848,311.50 : x
2. Step 2: Convert to fraction form
   388,087.50/848,311.50 = 848,311.50/x
3. Step 3: Cross multiply
   388,087.50x = 848,311.50 × 848,311.50
4. Step 4: Simplify right side
   388,087.50x = 719,632,401,032.25
5. Step 5: Solve for x
   x = 719,632,401,032.25/388,087.50
6. Step 6: Final answer
   x = 1,854,304.51