Finding the Fourth Proportional to 13,667.55, 20,506.61 and 7,089.63

Step by Step Solution

1. Step 1: Write the proportion equation
   13,667.55 : 20,506.61 = 7,089.63 : x
2. Step 2: Convert to fraction form
   13,667.55/20,506.61 = 7,089.63/x
3. Step 3: Cross multiply
   13,667.55x = 20,506.61 × 7,089.63
4. Step 4: Simplify right side
   13,667.55x = 145,384,242.01
5. Step 5: Solve for x
   x = 145,384,242.01/13,667.55
6. Step 6: Final answer
   x = 10,637.18