Finding the Fourth Proportional to 10,185.55, 15,272.15 and 3,940.30

Step by Step Solution

1. Step 1: Write the proportion equation
   10,185.55 : 15,272.15 = 3,940.30 : x
2. Step 2: Convert to fraction form
   10,185.55/15,272.15 = 3,940.30/x
3. Step 3: Cross multiply
   10,185.55x = 15,272.15 × 3,940.30
4. Step 4: Simplify right side
   10,185.55x = 60,176,766.13
5. Step 5: Solve for x
   x = 60,176,766.13/10,185.55
6. Step 6: Final answer
   x = 5,908.05