Finding the Fourth Proportional to 28,971.01, 39,976.69 and 16,222.42

Step by Step Solution

1. Step 1: Write the proportion equation
   28,971.01 : 39,976.69 = 16,222.42 : x
2. Step 2: Convert to fraction form
   28,971.01/39,976.69 = 16,222.42/x
3. Step 3: Cross multiply
   28,971.01x = 39,976.69 × 16,222.42
4. Step 4: Simplify right side
   28,971.01x = 648,518,514.89
5. Step 5: Solve for x
   x = 648,518,514.89/28,971.01
6. Step 6: Final answer
   x = 22,385.09