Finding the Third Proportional to 54,577.50 and 81,528.75

Step by Step Solution

1. Step 1: Write the proportion equation
   54,577.50 : 81,528.75 = 81,528.75 : x
2. Step 2: Convert to fraction form
   54,577.50/81,528.75 = 81,528.75/x
3. Step 3: Cross multiply
   54,577.50x = 81,528.75 × 81,528.75
4. Step 4: Simplify right side
   54,577.50x = 6,646,937,076.56
5. Step 5: Solve for x
   x = 6,646,937,076.56/54,577.50
6. Step 6: Final answer
   x = 121,788.96