Finding the Third Proportional to 777,820 and 1,663,536

Step by Step Solution

1. Step 1: Write the proportion equation
   777,820 : 1,663,536 = 1,663,536 : x
2. Step 2: Convert to fraction form
   777,820/1,663,536 = 1,663,536/x
3. Step 3: Cross multiply
   777,820x = 1,663,536 × 1,663,536
4. Step 4: Simplify right side
   777,820x = 2,767,352,023,296
5. Step 5: Solve for x
   x = 2,767,352,023,296/777,820
6. Step 6: Final answer
   x = 3,557,830.89