Finding the Fourth Proportional to 39,989.29, 55,185.30 and 22,085.05

Step by Step Solution

1. Step 1: Write the proportion equation
   39,989.29 : 55,185.30 = 22,085.05 : x
2. Step 2: Convert to fraction form
   39,989.29/55,185.30 = 22,085.05/x
3. Step 3: Cross multiply
   39,989.29x = 55,185.30 × 22,085.05
4. Step 4: Simplify right side
   39,989.29x = 1,218,770,109.77
5. Step 5: Solve for x
   x = 1,218,770,109.77/39,989.29
6. Step 6: Final answer
   x = 30,477.41