Finding the Third Proportional to 864,870 and 1,318,629

Step by Step Solution

1. Step 1: Write the proportion equation
   864,870 : 1,318,629 = 1,318,629 : x
2. Step 2: Convert to fraction form
   864,870/1,318,629 = 1,318,629/x
3. Step 3: Cross multiply
   864,870x = 1,318,629 × 1,318,629
4. Step 4: Simplify right side
   864,870x = 1,738,782,439,641
5. Step 5: Solve for x
   x = 1,738,782,439,641/864,870
6. Step 6: Final answer
   x = 2,010,455.26