Finding the Fourth Proportional to 39,989.88, 55,186.46 and 22,085.34

Step by Step Solution

1. Step 1: Write the proportion equation
   39,989.88 : 55,186.46 = 22,085.34 : x
2. Step 2: Convert to fraction form
   39,989.88/55,186.46 = 22,085.34/x
3. Step 3: Cross multiply
   39,989.88x = 55,186.46 × 22,085.34
4. Step 4: Simplify right side
   39,989.88x = 1,218,811,622.07
5. Step 5: Solve for x
   x = 1,218,811,622.07/39,989.88
6. Step 6: Final answer
   x = 30,478.00