Finding the Fourth Proportional to 123,912.20, 173,827 and 123,912.20

Step by Step Solution

1. Step 1: Write the proportion equation
   123,912.20 : 173,827 = 123,912.20 : x
2. Step 2: Convert to fraction form
   123,912.20/173,827 = 123,912.20/x
3. Step 3: Cross multiply
   123,912.20x = 173,827 × 123,912.20
4. Step 4: Simplify right side
   123,912.20x = 21,539,285,989.40
5. Step 5: Solve for x
   x = 21,539,285,989.40/123,912.20
6. Step 6: Final answer
   x = 173,827