Finding the Fourth Proportional to 123,139.20, 184,417.20 and 83,481.60

Step by Step Solution

1. Step 1: Write the proportion equation
   123,139.20 : 184,417.20 = 83,481.60 : x
2. Step 2: Convert to fraction form
   123,139.20/184,417.20 = 83,481.60/x
3. Step 3: Cross multiply
   123,139.20x = 184,417.20 × 83,481.60
4. Step 4: Simplify right side
   123,139.20x = 15,395,442,923.52
5. Step 5: Solve for x
   x = 15,395,442,923.52/123,139.20
6. Step 6: Final answer
   x = 125,024.71