Finding the Third Proportional to 1,257,786 and 1,778,058

Step by Step Solution

1. Step 1: Write the proportion equation
   1,257,786 : 1,778,058 = 1,778,058 : x
2. Step 2: Convert to fraction form
   1,257,786/1,778,058 = 1,778,058/x
3. Step 3: Cross multiply
   1,257,786x = 1,778,058 × 1,778,058
4. Step 4: Simplify right side
   1,257,786x = 3,161,490,251,364
5. Step 5: Solve for x
   x = 3,161,490,251,364/1,257,786
6. Step 6: Final answer
   x = 2,513,535.89