Finding the Third Proportional to 4,321,188 and 9,439,664

Step by Step Solution

1. Step 1: Write the proportion equation
   4,321,188 : 9,439,664 = 9,439,664 : x
2. Step 2: Convert to fraction form
   4,321,188/9,439,664 = 9,439,664/x
3. Step 3: Cross multiply
   4,321,188x = 9,439,664 × 9,439,664
4. Step 4: Simplify right side
   4,321,188x = 89,107,256,432,896
5. Step 5: Solve for x
   x = 89,107,256,432,896/4,321,188
6. Step 6: Final answer
   x = 20,621,008.95