Finding the Third Proportional to 54,799.03 and 81,979.59

Step by Step Solution

1. Step 1: Write the proportion equation
   54,799.03 : 81,979.59 = 81,979.59 : x
2. Step 2: Convert to fraction form
   54,799.03/81,979.59 = 81,979.59/x
3. Step 3: Cross multiply
   54,799.03x = 81,979.59 × 81,979.59
4. Step 4: Simplify right side
   54,799.03x = 6,720,653,791.42
5. Step 5: Solve for x
   x = 6,720,653,791.42/54,799.03
6. Step 6: Final answer
   x = 122,641.84