Finding the Fourth Proportional to 55,789.37, 76,990.91 and 30,640.49

Step by Step Solution

1. Step 1: Write the proportion equation
   55,789.37 : 76,990.91 = 30,640.49 : x
2. Step 2: Convert to fraction form
   55,789.37/76,990.91 = 30,640.49/x
3. Step 3: Cross multiply
   55,789.37x = 76,990.91 × 30,640.49
4. Step 4: Simplify right side
   55,789.37x = 2,359,039,054.74
5. Step 5: Solve for x
   x = 2,359,039,054.74/55,789.37
6. Step 6: Final answer
   x = 42,284.74