Finding the Fourth Proportional to 13,191.50, 18,196.71 and 8,715.98

Step by Step Solution

1. Step 1: Write the proportion equation
   13,191.50 : 18,196.71 = 8,715.98 : x
2. Step 2: Convert to fraction form
   13,191.50/18,196.71 = 8,715.98/x
3. Step 3: Cross multiply
   13,191.50x = 18,196.71 × 8,715.98
4. Step 4: Simplify right side
   13,191.50x = 158,602,160.43
5. Step 5: Solve for x
   x = 158,602,160.43/13,191.50
6. Step 6: Final answer
   x = 12,023.06