Finding the Third Proportional to 4,117,321 and 9,072,290

Step by Step Solution

1. Step 1: Write the proportion equation
   4,117,321 : 9,072,290 = 9,072,290 : x
2. Step 2: Convert to fraction form
   4,117,321/9,072,290 = 9,072,290/x
3. Step 3: Cross multiply
   4,117,321x = 9,072,290 × 9,072,290
4. Step 4: Simplify right side
   4,117,321x = 82,306,445,844,100
5. Step 5: Solve for x
   x = 82,306,445,844,100/4,117,321
6. Step 6: Final answer
   x = 19,990,291.22