Finding the Third Proportional to 4,386,398 and 9,781,345

Step by Step Solution

1. Step 1: Write the proportion equation
   4,386,398 : 9,781,345 = 9,781,345 : x
2. Step 2: Convert to fraction form
   4,386,398/9,781,345 = 9,781,345/x
3. Step 3: Cross multiply
   4,386,398x = 9,781,345 × 9,781,345
4. Step 4: Simplify right side
   4,386,398x = 95,674,710,009,025
5. Step 5: Solve for x
   x = 95,674,710,009,025/4,386,398
6. Step 6: Final answer
   x = 21,811,680.11