Finding the Third Proportional to 9,821,912 and 21,427,928

Step by Step Solution

1. Step 1: Write the proportion equation
   9,821,912 : 21,427,928 = 21,427,928 : x
2. Step 2: Convert to fraction form
   9,821,912/21,427,928 = 21,427,928/x
3. Step 3: Cross multiply
   9,821,912x = 21,427,928 × 21,427,928
4. Step 4: Simplify right side
   9,821,912x = 459,156,098,373,184
5. Step 5: Solve for x
   x = 459,156,098,373,184/9,821,912
6. Step 6: Final answer
   x = 46,748,138.08