Finding the Fourth Proportional to 123,155.10, 184,805.55 and 89,791.20

Step by Step Solution

1. Step 1: Write the proportion equation
   123,155.10 : 184,805.55 = 89,791.20 : x
2. Step 2: Convert to fraction form
   123,155.10/184,805.55 = 89,791.20/x
3. Step 3: Cross multiply
   123,155.10x = 184,805.55 × 89,791.20
4. Step 4: Simplify right side
   123,155.10x = 16,593,912,101.16
5. Step 5: Solve for x
   x = 16,593,912,101.16/123,155.10
6. Step 6: Final answer
   x = 134,739.95