Finding the Fourth Proportional to 72,855.24, 109,218.02 and 28,471.89

Step by Step Solution

1. Step 1: Write the proportion equation
   72,855.24 : 109,218.02 = 28,471.89 : x
2. Step 2: Convert to fraction form
   72,855.24/109,218.02 = 28,471.89/x
3. Step 3: Cross multiply
   72,855.24x = 109,218.02 × 28,471.89
4. Step 4: Simplify right side
   72,855.24x = 3,109,643,653.32
5. Step 5: Solve for x
   x = 3,109,643,653.32/72,855.24
6. Step 6: Final answer
   x = 42,682.50