Finding the Fourth Proportional to 39,769.48, 54,882.85 and 21,864.83

Step by Step Solution

1. Step 1: Write the proportion equation
   39,769.48 : 54,882.85 = 21,864.83 : x
2. Step 2: Convert to fraction form
   39,769.48/54,882.85 = 21,864.83/x
3. Step 3: Cross multiply
   39,769.48x = 54,882.85 × 21,864.83
4. Step 4: Simplify right side
   39,769.48x = 1,200,004,185.17
5. Step 5: Solve for x
   x = 1,200,004,185.17/39,769.48
6. Step 6: Final answer
   x = 30,174.00