Finding the Third Proportional to 21,355.31 and 51,003.94

Step by Step Solution

1. Step 1: Write the proportion equation
   21,355.31 : 51,003.94 = 51,003.94 : x
2. Step 2: Convert to fraction form
   21,355.31/51,003.94 = 51,003.94/x
3. Step 3: Cross multiply
   21,355.31x = 51,003.94 × 51,003.94
4. Step 4: Simplify right side
   21,355.31x = 2,601,401,640.50
5. Step 5: Solve for x
   x = 2,601,401,640.50/21,355.31
6. Step 6: Final answer
   x = 121,815.20