Finding the Fourth Proportional to 55,738.72, 76,920.66 and 30,588.28

Step by Step Solution

1. Step 1: Write the proportion equation
   55,738.72 : 76,920.66 = 30,588.28 : x
2. Step 2: Convert to fraction form
   55,738.72/76,920.66 = 30,588.28/x
3. Step 3: Cross multiply
   55,738.72x = 76,920.66 × 30,588.28
4. Step 4: Simplify right side
   55,738.72x = 2,352,870,685.86
5. Step 5: Solve for x
   x = 2,352,870,685.86/55,738.72
6. Step 6: Final answer
   x = 42,212.50