Finding the Third Proportional to 1,217,664 and 1,939,260

Step by Step Solution

1. Step 1: Write the proportion equation
   1,217,664 : 1,939,260 = 1,939,260 : x
2. Step 2: Convert to fraction form
   1,217,664/1,939,260 = 1,939,260/x
3. Step 3: Cross multiply
   1,217,664x = 1,939,260 × 1,939,260
4. Step 4: Simplify right side
   1,217,664x = 3,760,729,347,600
5. Step 5: Solve for x
   x = 3,760,729,347,600/1,217,664
6. Step 6: Final answer
   x = 3,088,478.72