Finding the Fourth Proportional to 9,180.99, 13,765.89 and 3,913.05

Step by Step Solution

1. Step 1: Write the proportion equation
   9,180.99 : 13,765.89 = 3,913.05 : x
2. Step 2: Convert to fraction form
   9,180.99/13,765.89 = 3,913.05/x
3. Step 3: Cross multiply
   9,180.99x = 13,765.89 × 3,913.05
4. Step 4: Simplify right side
   9,180.99x = 53,866,682.16
5. Step 5: Solve for x
   x = 53,866,682.16/9,180.99
6. Step 6: Final answer
   x = 5,867.20