Finding the Third Proportional to 3,931,342 and 8,409,175

Step by Step Solution

1. Step 1: Write the proportion equation
   3,931,342 : 8,409,175 = 8,409,175 : x
2. Step 2: Convert to fraction form
   3,931,342/8,409,175 = 8,409,175/x
3. Step 3: Cross multiply
   3,931,342x = 8,409,175 × 8,409,175
4. Step 4: Simplify right side
   3,931,342x = 70,714,224,180,625
5. Step 5: Solve for x
   x = 70,714,224,180,625/3,931,342
6. Step 6: Final answer
   x = 17,987,299.04