Finding the Third Proportional to 388,710 and 599,665.50

Step by Step Solution

1. Step 1: Write the proportion equation
   388,710 : 599,665.50 = 599,665.50 : x
2. Step 2: Convert to fraction form
   388,710/599,665.50 = 599,665.50/x
3. Step 3: Cross multiply
   388,710x = 599,665.50 × 599,665.50
4. Step 4: Simplify right side
   388,710x = 359,598,711,890.25
5. Step 5: Solve for x
   x = 359,598,711,890.25/388,710
6. Step 6: Final answer
   x = 925,107.95