Finding the Third Proportional to 4,558,946 and 9,728,126

Step by Step Solution

1. Step 1: Write the proportion equation
   4,558,946 : 9,728,126 = 9,728,126 : x
2. Step 2: Convert to fraction form
   4,558,946/9,728,126 = 9,728,126/x
3. Step 3: Cross multiply
   4,558,946x = 9,728,126 × 9,728,126
4. Step 4: Simplify right side
   4,558,946x = 94,636,435,471,876
5. Step 5: Solve for x
   x = 94,636,435,471,876/4,558,946
6. Step 6: Final answer
   x = 20,758,402.37