Finding the Fourth Proportional to 72,573.22, 108,887.82 and 28,231.21

Step by Step Solution

1. Step 1: Write the proportion equation
   72,573.22 : 108,887.82 = 28,231.21 : x
2. Step 2: Convert to fraction form
   72,573.22/108,887.82 = 28,231.21/x
3. Step 3: Cross multiply
   72,573.22x = 108,887.82 × 28,231.21
4. Step 4: Simplify right side
   72,573.22x = 3,074,034,912.86
5. Step 5: Solve for x
   x = 3,074,034,912.86/72,573.22
6. Step 6: Final answer
   x = 42,357.70