Finding the Third Proportional to 388,719 and 599,683.50

Step by Step Solution

1. Step 1: Write the proportion equation
   388,719 : 599,683.50 = 599,683.50 : x
2. Step 2: Convert to fraction form
   388,719/599,683.50 = 599,683.50/x
3. Step 3: Cross multiply
   388,719x = 599,683.50 × 599,683.50
4. Step 4: Simplify right side
   388,719x = 359,620,300,172.25
5. Step 5: Solve for x
   x = 359,620,300,172.25/388,719
6. Step 6: Final answer
   x = 925,142.07