Finding the Third Proportional to 55,507.50 and 81,791.25

Step by Step Solution

1. Step 1: Write the proportion equation
   55,507.50 : 81,791.25 = 81,791.25 : x
2. Step 2: Convert to fraction form
   55,507.50/81,791.25 = 81,791.25/x
3. Step 3: Cross multiply
   55,507.50x = 81,791.25 × 81,791.25
4. Step 4: Simplify right side
   55,507.50x = 6,689,808,576.56
5. Step 5: Solve for x
   x = 6,689,808,576.56/55,507.50
6. Step 6: Final answer
   x = 120,520.80