Finding the Third Proportional to 21,105,678 and 31,534,273.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,105,678 : 31,534,273.50 = 31,534,273.50 : x
2. Step 2: Convert to fraction form
   21,105,678/31,534,273.50 = 31,534,273.50/x
3. Step 3: Cross multiply
   21,105,678x = 31,534,273.50 × 31,534,273.50
4. Step 4: Simplify right side
   21,105,678x = 994,410,405,172,802.25
5. Step 5: Solve for x
   x = 994,410,405,172,802.25/21,105,678
6. Step 6: Final answer
   x = 47,115,776.39