Finding the Fourth Proportional to 7,771.72, 11,653.48 and 3,613.69

Step by Step Solution

1. Step 1: Write the proportion equation
   7,771.72 : 11,653.48 = 3,613.69 : x
2. Step 2: Convert to fraction form
   7,771.72/11,653.48 = 3,613.69/x
3. Step 3: Cross multiply
   7,771.72x = 11,653.48 × 3,613.69
4. Step 4: Simplify right side
   7,771.72x = 42,112,055.53
5. Step 5: Solve for x
   x = 42,112,055.53/7,771.72
6. Step 6: Final answer
   x = 5,418.63