Finding the Third Proportional to 393,322.50 and 858,069

Step by Step Solution

1. Step 1: Write the proportion equation
   393,322.50 : 858,069 = 858,069 : x
2. Step 2: Convert to fraction form
   393,322.50/858,069 = 858,069/x
3. Step 3: Cross multiply
   393,322.50x = 858,069 × 858,069
4. Step 4: Simplify right side
   393,322.50x = 736,282,408,761
5. Step 5: Solve for x
   x = 736,282,408,761/393,322.50
6. Step 6: Final answer
   x = 1,871,955.99