Finding the Third Proportional to 393,891.50 and 859,075

Step by Step Solution

1. Step 1: Write the proportion equation
   393,891.50 : 859,075 = 859,075 : x
2. Step 2: Convert to fraction form
   393,891.50/859,075 = 859,075/x
3. Step 3: Cross multiply
   393,891.50x = 859,075 × 859,075
4. Step 4: Simplify right side
   393,891.50x = 738,009,855,625
5. Step 5: Solve for x
   x = 738,009,855,625/393,891.50
6. Step 6: Final answer
   x = 1,873,637.42