Finding the Third Proportional to 3,931,260 and 8,409,029

Step by Step Solution

1. Step 1: Write the proportion equation
   3,931,260 : 8,409,029 = 8,409,029 : x
2. Step 2: Convert to fraction form
   3,931,260/8,409,029 = 8,409,029/x
3. Step 3: Cross multiply
   3,931,260x = 8,409,029 × 8,409,029
4. Step 4: Simplify right side
   3,931,260x = 70,711,768,722,841
5. Step 5: Solve for x
   x = 70,711,768,722,841/3,931,260
6. Step 6: Final answer
   x = 17,987,049.63