Finding the Fourth Proportional to 9,621.09, 13,277.15 and 5,642.27

Step by Step Solution

1. Step 1: Write the proportion equation
   9,621.09 : 13,277.15 = 5,642.27 : x
2. Step 2: Convert to fraction form
   9,621.09/13,277.15 = 5,642.27/x
3. Step 3: Cross multiply
   9,621.09x = 13,277.15 × 5,642.27
4. Step 4: Simplify right side
   9,621.09x = 74,913,212.85
5. Step 5: Solve for x
   x = 74,913,212.85/9,621.09
6. Step 6: Final answer
   x = 7,786.35