Finding the Third Proportional to 9,173,018 and 21,420,545

Step by Step Solution

1. Step 1: Write the proportion equation
   9,173,018 : 21,420,545 = 21,420,545 : x
2. Step 2: Convert to fraction form
   9,173,018/21,420,545 = 21,420,545/x
3. Step 3: Cross multiply
   9,173,018x = 21,420,545 × 21,420,545
4. Step 4: Simplify right side
   9,173,018x = 458,839,748,097,025
5. Step 5: Solve for x
   x = 458,839,748,097,025/9,173,018
6. Step 6: Final answer
   x = 50,020,587.35