Finding the Third Proportional to 55,123 and 87,607

Step by Step Solution

1. Step 1: Write the proportion equation
   55,123 : 87,607 = 87,607 : x
2. Step 2: Convert to fraction form
   55,123/87,607 = 87,607/x
3. Step 3: Cross multiply
   55,123x = 87,607 × 87,607
4. Step 4: Simplify right side
   55,123x = 7,674,986,449
5. Step 5: Solve for x
   x = 7,674,986,449/55,123
6. Step 6: Final answer
   x = 139,233.83