Finding the Fourth Proportional to 72,561.73, 108,800.69 and 28,136.58

Step by Step Solution

1. Step 1: Write the proportion equation
   72,561.73 : 108,800.69 = 28,136.58 : x
2. Step 2: Convert to fraction form
   72,561.73/108,800.69 = 28,136.58/x
3. Step 3: Cross multiply
   72,561.73x = 108,800.69 × 28,136.58
4. Step 4: Simplify right side
   72,561.73x = 3,061,279,177.56
5. Step 5: Solve for x
   x = 3,061,279,177.56/72,561.73
6. Step 6: Final answer
   x = 42,188.62