Finding the Third Proportional to 55,419.19 and 87,768.56

Step by Step Solution

1. Step 1: Write the proportion equation
   55,419.19 : 87,768.56 = 87,768.56 : x
2. Step 2: Convert to fraction form
   55,419.19/87,768.56 = 87,768.56/x
3. Step 3: Cross multiply
   55,419.19x = 87,768.56 × 87,768.56
4. Step 4: Simplify right side
   55,419.19x = 7,703,320,563.32
5. Step 5: Solve for x
   x = 7,703,320,563.32/55,419.19
6. Step 6: Final answer
   x = 139,000.97