Finding the Third Proportional to 21,996.56 and 53,161.31

Step by Step Solution

1. Step 1: Write the proportion equation
   21,996.56 : 53,161.31 = 53,161.31 : x
2. Step 2: Convert to fraction form
   21,996.56/53,161.31 = 53,161.31/x
3. Step 3: Cross multiply
   21,996.56x = 53,161.31 × 53,161.31
4. Step 4: Simplify right side
   21,996.56x = 2,826,125,146.72
5. Step 5: Solve for x
   x = 2,826,125,146.72/21,996.56
6. Step 6: Final answer
   x = 128,480.31