Finding the Fourth Proportional to 18,102.21, 27,157.56 and 5,621.59

Step by Step Solution

1. Step 1: Write the proportion equation
   18,102.21 : 27,157.56 = 5,621.59 : x
2. Step 2: Convert to fraction form
   18,102.21/27,157.56 = 5,621.59/x
3. Step 3: Cross multiply
   18,102.21x = 27,157.56 × 5,621.59
4. Step 4: Simplify right side
   18,102.21x = 152,668,667.72
5. Step 5: Solve for x
   x = 152,668,667.72/18,102.21
6. Step 6: Final answer
   x = 8,433.70