Finding the Third Proportional to 393,870 and 859,034

Step by Step Solution

1. Step 1: Write the proportion equation
   393,870 : 859,034 = 859,034 : x
2. Step 2: Convert to fraction form
   393,870/859,034 = 859,034/x
3. Step 3: Cross multiply
   393,870x = 859,034 × 859,034
4. Step 4: Simplify right side
   393,870x = 737,939,413,156
5. Step 5: Solve for x
   x = 737,939,413,156/393,870
6. Step 6: Final answer
   x = 1,873,560.85