Finding the Fourth Proportional to 20,698.75, 30,889.06 and 18,484.30

Step by Step Solution

1. Step 1: Write the proportion equation
   20,698.75 : 30,889.06 = 18,484.30 : x
2. Step 2: Convert to fraction form
   20,698.75/30,889.06 = 18,484.30/x
3. Step 3: Cross multiply
   20,698.75x = 30,889.06 × 18,484.30
4. Step 4: Simplify right side
   20,698.75x = 570,962,404.89
5. Step 5: Solve for x
   x = 570,962,404.89/20,698.75
6. Step 6: Final answer
   x = 27,584.40