Finding the Third Proportional to 3,971,480 and 8,572,810

Step by Step Solution

1. Step 1: Write the proportion equation
   3,971,480 : 8,572,810 = 8,572,810 : x
2. Step 2: Convert to fraction form
   3,971,480/8,572,810 = 8,572,810/x
3. Step 3: Cross multiply
   3,971,480x = 8,572,810 × 8,572,810
4. Step 4: Simplify right side
   3,971,480x = 73,493,071,296,100
5. Step 5: Solve for x
   x = 73,493,071,296,100/3,971,480
6. Step 6: Final answer
   x = 18,505,209.97