Finding the Third Proportional to 1,287,221 and 2,773,789

Step by Step Solution

1. Step 1: Write the proportion equation
   1,287,221 : 2,773,789 = 2,773,789 : x
2. Step 2: Convert to fraction form
   1,287,221/2,773,789 = 2,773,789/x
3. Step 3: Cross multiply
   1,287,221x = 2,773,789 × 2,773,789
4. Step 4: Simplify right side
   1,287,221x = 7,693,905,416,521
5. Step 5: Solve for x
   x = 7,693,905,416,521/1,287,221
6. Step 6: Final answer
   x = 5,977,144.11