Finding the Third Proportional to 397,797 and 859,138.50

Step by Step Solution

1. Step 1: Write the proportion equation
   397,797 : 859,138.50 = 859,138.50 : x
2. Step 2: Convert to fraction form
   397,797/859,138.50 = 859,138.50/x
3. Step 3: Cross multiply
   397,797x = 859,138.50 × 859,138.50
4. Step 4: Simplify right side
   397,797x = 738,118,962,182.25
5. Step 5: Solve for x
   x = 738,118,962,182.25/397,797
6. Step 6: Final answer
   x = 1,855,516.66