Finding the Fourth Proportional to 22,698.52, 31,311.18 and 13,621.55

Step by Step Solution

1. Step 1: Write the proportion equation
   22,698.52 : 31,311.18 = 13,621.55 : x
2. Step 2: Convert to fraction form
   22,698.52/31,311.18 = 13,621.55/x
3. Step 3: Cross multiply
   22,698.52x = 31,311.18 × 13,621.55
4. Step 4: Simplify right side
   22,698.52x = 426,506,647.37
5. Step 5: Solve for x
   x = 426,506,647.37/22,698.52
6. Step 6: Final answer
   x = 18,790.07