Finding the Fourth Proportional to 72,564.84, 108,819.30 and 28,185.75

Step by Step Solution

1. Step 1: Write the proportion equation
   72,564.84 : 108,819.30 = 28,185.75 : x
2. Step 2: Convert to fraction form
   72,564.84/108,819.30 = 28,185.75/x
3. Step 3: Cross multiply
   72,564.84x = 108,819.30 × 28,185.75
4. Step 4: Simplify right side
   72,564.84x = 3,067,153,584.98
5. Step 5: Solve for x
   x = 3,067,153,584.98/72,564.84
6. Step 6: Final answer
   x = 42,267.76