Finding the Fourth Proportional to 72,592.49, 108,930.15 and 28,213.47

Step by Step Solution

1. Step 1: Write the proportion equation
   72,592.49 : 108,930.15 = 28,213.47 : x
2. Step 2: Convert to fraction form
   72,592.49/108,930.15 = 28,213.47/x
3. Step 3: Cross multiply
   72,592.49x = 108,930.15 × 28,213.47
4. Step 4: Simplify right side
   72,592.49x = 3,073,297,519.12
5. Step 5: Solve for x
   x = 3,073,297,519.12/72,592.49
6. Step 6: Final answer
   x = 42,336.30