Finding the Third Proportional to 726,939 and 1,490,139

Step by Step Solution

1. Step 1: Write the proportion equation
   726,939 : 1,490,139 = 1,490,139 : x
2. Step 2: Convert to fraction form
   726,939/1,490,139 = 1,490,139/x
3. Step 3: Cross multiply
   726,939x = 1,490,139 × 1,490,139
4. Step 4: Simplify right side
   726,939x = 2,220,514,239,321
5. Step 5: Solve for x
   x = 2,220,514,239,321/726,939
6. Step 6: Final answer
   x = 3,054,608.76