Finding the Third Proportional to 3,979,539 and 8,526,789

Step by Step Solution

1. Step 1: Write the proportion equation
   3,979,539 : 8,526,789 = 8,526,789 : x
2. Step 2: Convert to fraction form
   3,979,539/8,526,789 = 8,526,789/x
3. Step 3: Cross multiply
   3,979,539x = 8,526,789 × 8,526,789
4. Step 4: Simplify right side
   3,979,539x = 72,706,130,650,521
5. Step 5: Solve for x
   x = 72,706,130,650,521/3,979,539
6. Step 6: Final answer
   x = 18,269,988.22