Finding the Third Proportional to 407,686.50 and 864,702

Step by Step Solution

1. Step 1: Write the proportion equation
   407,686.50 : 864,702 = 864,702 : x
2. Step 2: Convert to fraction form
   407,686.50/864,702 = 864,702/x
3. Step 3: Cross multiply
   407,686.50x = 864,702 × 864,702
4. Step 4: Simplify right side
   407,686.50x = 747,709,548,804
5. Step 5: Solve for x
   x = 747,709,548,804/407,686.50
6. Step 6: Final answer
   x = 1,834,030.68