Finding the Third Proportional to 54,900.75 and 80,619.56

Step by Step Solution

1. Step 1: Write the proportion equation
   54,900.75 : 80,619.56 = 80,619.56 : x
2. Step 2: Convert to fraction form
   54,900.75/80,619.56 = 80,619.56/x
3. Step 3: Cross multiply
   54,900.75x = 80,619.56 × 80,619.56
4. Step 4: Simplify right side
   54,900.75x = 6,499,513,857.69
5. Step 5: Solve for x
   x = 6,499,513,857.69/54,900.75
6. Step 6: Final answer
   x = 118,386.61