Finding the Fourth Proportional to 123,128.20, 184,720.83 and 38,896.72

Step by Step Solution

1. Step 1: Write the proportion equation
   123,128.20 : 184,720.83 = 38,896.72 : x
2. Step 2: Convert to fraction form
   123,128.20/184,720.83 = 38,896.72/x
3. Step 3: Cross multiply
   123,128.20x = 184,720.83 × 38,896.72
4. Step 4: Simplify right side
   123,128.20x = 7,185,034,402.68
5. Step 5: Solve for x
   x = 7,185,034,402.68/123,128.20
6. Step 6: Final answer
   x = 58,354.09