Finding the Third Proportional to 21,118.78 and 45,723.09

Step by Step Solution

1. Step 1: Write the proportion equation
   21,118.78 : 45,723.09 = 45,723.09 : x
2. Step 2: Convert to fraction form
   21,118.78/45,723.09 = 45,723.09/x
3. Step 3: Cross multiply
   21,118.78x = 45,723.09 × 45,723.09
4. Step 4: Simplify right side
   21,118.78x = 2,090,601,302.07
5. Step 5: Solve for x
   x = 2,090,601,302.07/21,118.78
6. Step 6: Final answer
   x = 98,992.52