Finding the Fourth Proportional to 72,533.76, 108,789.12 and 28,180.80

Step by Step Solution

1. Step 1: Write the proportion equation
   72,533.76 : 108,789.12 = 28,180.80 : x
2. Step 2: Convert to fraction form
   72,533.76/108,789.12 = 28,180.80/x
3. Step 3: Cross multiply
   72,533.76x = 108,789.12 × 28,180.80
4. Step 4: Simplify right side
   72,533.76x = 3,065,764,432.90
5. Step 5: Solve for x
   x = 3,065,764,432.90/72,533.76
6. Step 6: Final answer
   x = 42,266.72