Finding the Third Proportional to 4,579,430 and 9,946,180

Step by Step Solution

1. Step 1: Write the proportion equation
   4,579,430 : 9,946,180 = 9,946,180 : x
2. Step 2: Convert to fraction form
   4,579,430/9,946,180 = 9,946,180/x
3. Step 3: Cross multiply
   4,579,430x = 9,946,180 × 9,946,180
4. Step 4: Simplify right side
   4,579,430x = 98,926,496,592,400
5. Step 5: Solve for x
   x = 98,926,496,592,400/4,579,430
6. Step 6: Final answer
   x = 21,602,360.25