Finding the Fourth Proportional to 13,086.53, 19,630.25 and 5,190.55

Step by Step Solution

1. Step 1: Write the proportion equation
   13,086.53 : 19,630.25 = 5,190.55 : x
2. Step 2: Convert to fraction form
   13,086.53/19,630.25 = 5,190.55/x
3. Step 3: Cross multiply
   13,086.53x = 19,630.25 × 5,190.55
4. Step 4: Simplify right side
   13,086.53x = 101,891,738.57
5. Step 5: Solve for x
   x = 101,891,738.57/13,086.53
6. Step 6: Final answer
   x = 7,786.00