Finding the Third Proportional to 4,201,272 and 8,556,705

Step by Step Solution

1. Step 1: Write the proportion equation
   4,201,272 : 8,556,705 = 8,556,705 : x
2. Step 2: Convert to fraction form
   4,201,272/8,556,705 = 8,556,705/x
3. Step 3: Cross multiply
   4,201,272x = 8,556,705 × 8,556,705
4. Step 4: Simplify right side
   4,201,272x = 73,217,200,457,025
5. Step 5: Solve for x
   x = 73,217,200,457,025/4,201,272
6. Step 6: Final answer
   x = 17,427,388.77