Finding the Fourth Proportional to 89,185.46, 123,078.28 and 50,420.20

Step by Step Solution

1. Step 1: Write the proportion equation
   89,185.46 : 123,078.28 = 50,420.20 : x
2. Step 2: Convert to fraction form
   89,185.46/123,078.28 = 50,420.20/x
3. Step 3: Cross multiply
   89,185.46x = 123,078.28 × 50,420.20
4. Step 4: Simplify right side
   89,185.46x = 6,205,631,493.26
5. Step 5: Solve for x
   x = 6,205,631,493.26/89,185.46
6. Step 6: Final answer
   x = 69,581.20