Finding the Fourth Proportional to 72,573.72, 108,888.57 and 28,231.71

Step by Step Solution

1. Step 1: Write the proportion equation
   72,573.72 : 108,888.57 = 28,231.71 : x
2. Step 2: Convert to fraction form
   72,573.72/108,888.57 = 28,231.71/x
3. Step 3: Cross multiply
   72,573.72x = 108,888.57 × 28,231.71
4. Step 4: Simplify right side
   72,573.72x = 3,074,110,530.55
5. Step 5: Solve for x
   x = 3,074,110,530.55/72,573.72
6. Step 6: Final answer
   x = 42,358.45