Finding the Fourth Proportional to 123,128.87, 184,683.42 and 54,761.58

Step by Step Solution

1. Step 1: Write the proportion equation
   123,128.87 : 184,683.42 = 54,761.58 : x
2. Step 2: Convert to fraction form
   123,128.87/184,683.42 = 54,761.58/x
3. Step 3: Cross multiply
   123,128.87x = 184,683.42 × 54,761.58
4. Step 4: Simplify right side
   123,128.87x = 10,113,555,879.00
5. Step 5: Solve for x
   x = 10,113,555,879.00/123,128.87
6. Step 6: Final answer
   x = 82,137.98