Finding the Fourth Proportional to 39,889.83, 55,048.61 and 21,984.58

Step by Step Solution

1. Step 1: Write the proportion equation
   39,889.83 : 55,048.61 = 21,984.58 : x
2. Step 2: Convert to fraction form
   39,889.83/55,048.61 = 21,984.58/x
3. Step 3: Cross multiply
   39,889.83x = 55,048.61 × 21,984.58
4. Step 4: Simplify right side
   39,889.83x = 1,210,220,185.27
5. Step 5: Solve for x
   x = 1,210,220,185.27/39,889.83
6. Step 6: Final answer
   x = 30,339.07