Finding the Third Proportional to 55,777.50 and 78,016.50

Step by Step Solution

1. Step 1: Write the proportion equation
   55,777.50 : 78,016.50 = 78,016.50 : x
2. Step 2: Convert to fraction form
   55,777.50/78,016.50 = 78,016.50/x
3. Step 3: Cross multiply
   55,777.50x = 78,016.50 × 78,016.50
4. Step 4: Simplify right side
   55,777.50x = 6,086,574,272.25
5. Step 5: Solve for x
   x = 6,086,574,272.25/55,777.50
6. Step 6: Final answer
   x = 109,122.39