Finding the Third Proportional to 55,471.50 and 84,589.31

Step by Step Solution

1. Step 1: Write the proportion equation
   55,471.50 : 84,589.31 = 84,589.31 : x
2. Step 2: Convert to fraction form
   55,471.50/84,589.31 = 84,589.31/x
3. Step 3: Cross multiply
   55,471.50x = 84,589.31 × 84,589.31
4. Step 4: Simplify right side
   55,471.50x = 7,155,351,789.22
5. Step 5: Solve for x
   x = 7,155,351,789.22/55,471.50
6. Step 6: Final answer
   x = 128,991.50