Finding the Fourth Proportional to 72,907.69, 109,357.89 and 28,542.58

Step by Step Solution

1. Step 1: Write the proportion equation
   72,907.69 : 109,357.89 = 28,542.58 : x
2. Step 2: Convert to fraction form
   72,907.69/109,357.89 = 28,542.58/x
3. Step 3: Cross multiply
   72,907.69x = 109,357.89 × 28,542.58
4. Step 4: Simplify right side
   72,907.69x = 3,121,355,848.52
5. Step 5: Solve for x
   x = 3,121,355,848.52/72,907.69
6. Step 6: Final answer
   x = 42,812.44