Finding the Third Proportional to 728,088 and 1,139,666

Step by Step Solution

1. Step 1: Write the proportion equation
   728,088 : 1,139,666 = 1,139,666 : x
2. Step 2: Convert to fraction form
   728,088/1,139,666 = 1,139,666/x
3. Step 3: Cross multiply
   728,088x = 1,139,666 × 1,139,666
4. Step 4: Simplify right side
   728,088x = 1,298,838,591,556
5. Step 5: Solve for x
   x = 1,298,838,591,556/728,088
6. Step 6: Final answer
   x = 1,783,903.31