Finding the Fourth Proportional to 13,700.50, 18,906.69 and 8,111.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,700.50 : 18,906.69 = 8,111.50 : x
2. Step 2: Convert to fraction form
   13,700.50/18,906.69 = 8,111.50/x
3. Step 3: Cross multiply
   13,700.50x = 18,906.69 × 8,111.50
4. Step 4: Simplify right side
   13,700.50x = 153,361,615.94
5. Step 5: Solve for x
   x = 153,361,615.94/13,700.50
6. Step 6: Final answer
   x = 11,193.87