Finding the Fourth Proportional to 13,189.32, 18,196.29 and 8,654.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,189.32 : 18,196.29 = 8,654.50 : x
2. Step 2: Convert to fraction form
   13,189.32/18,196.29 = 8,654.50/x
3. Step 3: Cross multiply
   13,189.32x = 18,196.29 × 8,654.50
4. Step 4: Simplify right side
   13,189.32x = 157,479,791.81
5. Step 5: Solve for x
   x = 157,479,791.81/13,189.32
6. Step 6: Final answer
   x = 11,939.95