Finding the Third Proportional to 1,220,840 and 1,859,664

Step by Step Solution

1. Step 1: Write the proportion equation
   1,220,840 : 1,859,664 = 1,859,664 : x
2. Step 2: Convert to fraction form
   1,220,840/1,859,664 = 1,859,664/x
3. Step 3: Cross multiply
   1,220,840x = 1,859,664 × 1,859,664
4. Step 4: Simplify right side
   1,220,840x = 3,458,350,192,896
5. Step 5: Solve for x
   x = 3,458,350,192,896/1,220,840
6. Step 6: Final answer
   x = 2,832,762.85