Finding the Third Proportional to 4,321,188 and 9,439,659

Step by Step Solution

1. Step 1: Write the proportion equation
   4,321,188 : 9,439,659 = 9,439,659 : x
2. Step 2: Convert to fraction form
   4,321,188/9,439,659 = 9,439,659/x
3. Step 3: Cross multiply
   4,321,188x = 9,439,659 × 9,439,659
4. Step 4: Simplify right side
   4,321,188x = 89,107,162,036,281
5. Step 5: Solve for x
   x = 89,107,162,036,281/4,321,188
6. Step 6: Final answer
   x = 20,620,987.11