Finding the Fourth Proportional to 13,693.93, 18,909.15 and 8,667.02

Step by Step Solution

1. Step 1: Write the proportion equation
   13,693.93 : 18,909.15 = 8,667.02 : x
2. Step 2: Convert to fraction form
   13,693.93/18,909.15 = 8,667.02/x
3. Step 3: Cross multiply
   13,693.93x = 18,909.15 × 8,667.02
4. Step 4: Simplify right side
   13,693.93x = 163,886,028.51
5. Step 5: Solve for x
   x = 163,886,028.51/13,693.93
6. Step 6: Final answer
   x = 11,967.78