Finding the Fourth Proportional to 55,636.28, 76,778.04 and 30,485.72

Step by Step Solution

1. Step 1: Write the proportion equation
   55,636.28 : 76,778.04 = 30,485.72 : x
2. Step 2: Convert to fraction form
   55,636.28/76,778.04 = 30,485.72/x
3. Step 3: Cross multiply
   55,636.28x = 76,778.04 × 30,485.72
4. Step 4: Simplify right side
   55,636.28x = 2,340,633,829.59
5. Step 5: Solve for x
   x = 2,340,633,829.59/55,636.28
6. Step 6: Final answer
   x = 42,070.28