Finding the Fourth Proportional to 123,069.20, 184,312.20 and 83,411.60

Step by Step Solution

1. Step 1: Write the proportion equation
   123,069.20 : 184,312.20 = 83,411.60 : x
2. Step 2: Convert to fraction form
   123,069.20/184,312.20 = 83,411.60/x
3. Step 3: Cross multiply
   123,069.20x = 184,312.20 × 83,411.60
4. Step 4: Simplify right side
   123,069.20x = 15,373,775,501.52
5. Step 5: Solve for x
   x = 15,373,775,501.52/123,069.20
6. Step 6: Final answer
   x = 124,919.76