Finding the Fourth Proportional to 55,129.39, 76,078.37 and 29,978.89

Step by Step Solution

1. Step 1: Write the proportion equation
   55,129.39 : 76,078.37 = 29,978.89 : x
2. Step 2: Convert to fraction form
   55,129.39/76,078.37 = 29,978.89/x
3. Step 3: Cross multiply
   55,129.39x = 76,078.37 × 29,978.89
4. Step 4: Simplify right side
   55,129.39x = 2,280,744,555.32
5. Step 5: Solve for x
   x = 2,280,744,555.32/55,129.39
6. Step 6: Final answer
   x = 41,370.76