Finding the Fourth Proportional to 49,761.20, 68,621.55 and 42,228.20

Step by Step Solution

1. Step 1: Write the proportion equation
   49,761.20 : 68,621.55 = 42,228.20 : x
2. Step 2: Convert to fraction form
   49,761.20/68,621.55 = 42,228.20/x
3. Step 3: Cross multiply
   49,761.20x = 68,621.55 × 42,228.20
4. Step 4: Simplify right side
   49,761.20x = 2,897,764,194.60
5. Step 5: Solve for x
   x = 2,897,764,194.60/49,761.20
6. Step 6: Final answer
   x = 58,233.41