Finding the Third Proportional to 55,120.50 and 87,603.75

Step by Step Solution

1. Step 1: Write the proportion equation
   55,120.50 : 87,603.75 = 87,603.75 : x
2. Step 2: Convert to fraction form
   55,120.50/87,603.75 = 87,603.75/x
3. Step 3: Cross multiply
   55,120.50x = 87,603.75 × 87,603.75
4. Step 4: Simplify right side
   55,120.50x = 7,674,417,014.06
5. Step 5: Solve for x
   x = 7,674,417,014.06/55,120.50
6. Step 6: Final answer
   x = 139,229.81