Finding the Third Proportional to 393,871.50 and 859,035

Step by Step Solution

1. Step 1: Write the proportion equation
   393,871.50 : 859,035 = 859,035 : x
2. Step 2: Convert to fraction form
   393,871.50/859,035 = 859,035/x
3. Step 3: Cross multiply
   393,871.50x = 859,035 × 859,035
4. Step 4: Simplify right side
   393,871.50x = 737,941,131,225
5. Step 5: Solve for x
   x = 737,941,131,225/393,871.50
6. Step 6: Final answer
   x = 1,873,558.08