Finding the Fourth Proportional to 72,579.98, 108,841.98 and 28,200.89

Step by Step Solution

1. Step 1: Write the proportion equation
   72,579.98 : 108,841.98 = 28,200.89 : x
2. Step 2: Convert to fraction form
   72,579.98/108,841.98 = 28,200.89/x
3. Step 3: Cross multiply
   72,579.98x = 108,841.98 × 28,200.89
4. Step 4: Simplify right side
   72,579.98x = 3,069,440,705.36
5. Step 5: Solve for x
   x = 3,069,440,705.36/72,579.98
6. Step 6: Final answer
   x = 42,290.46