Finding the Fourth Proportional to 12,865.50, 19,330.52 and 8,187.53

Step by Step Solution

1. Step 1: Write the proportion equation
   12,865.50 : 19,330.52 = 8,187.53 : x
2. Step 2: Convert to fraction form
   12,865.50/19,330.52 = 8,187.53/x
3. Step 3: Cross multiply
   12,865.50x = 19,330.52 × 8,187.53
4. Step 4: Simplify right side
   12,865.50x = 158,269,074.83
5. Step 5: Solve for x
   x = 158,269,074.83/12,865.50
6. Step 6: Final answer
   x = 12,301.82