Finding the Third Proportional to 579,674 and 891,111

Step by Step Solution

1. Step 1: Write the proportion equation
   579,674 : 891,111 = 891,111 : x
2. Step 2: Convert to fraction form
   579,674/891,111 = 891,111/x
3. Step 3: Cross multiply
   579,674x = 891,111 × 891,111
4. Step 4: Simplify right side
   579,674x = 794,078,814,321
5. Step 5: Solve for x
   x = 794,078,814,321/579,674
6. Step 6: Final answer
   x = 1,369,871.37