Finding the Fourth Proportional to 22,185.42, 33,085.70 and 18,919.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,185.42 : 33,085.70 = 18,919.50 : x
2. Step 2: Convert to fraction form
   22,185.42/33,085.70 = 18,919.50/x
3. Step 3: Cross multiply
   22,185.42x = 33,085.70 × 18,919.50
4. Step 4: Simplify right side
   22,185.42x = 625,964,806.55
5. Step 5: Solve for x
   x = 625,964,806.55/22,185.42
6. Step 6: Final answer
   x = 28,215.14