Finding the Third Proportional to 866,111,808 and 1,778,138,834

Step by Step Solution

1. Step 1: Write the proportion equation
   866,111,808 : 1,778,138,834 = 1,778,138,834 : x
2. Step 2: Convert to fraction form
   866,111,808/1,778,138,834 = 1,778,138,834/x
3. Step 3: Cross multiply
   866,111,808x = 1,778,138,834 × 1,778,138,834
4. Step 4: Simplify right side
   866,111,808x = 3,161,777,712,978,879,488
5. Step 5: Solve for x
   x = 3,161,777,712,978,879,488/866,111,808
6. Step 6: Final answer
   x = 3,650,542,209.19