Finding the Fourth Proportional to 9,621.41, 13,280.81 and 5,641.07

Step by Step Solution

1. Step 1: Write the proportion equation
   9,621.41 : 13,280.81 = 5,641.07 : x
2. Step 2: Convert to fraction form
   9,621.41/13,280.81 = 5,641.07/x
3. Step 3: Cross multiply
   9,621.41x = 13,280.81 × 5,641.07
4. Step 4: Simplify right side
   9,621.41x = 74,917,884.26
5. Step 5: Solve for x
   x = 74,917,884.26/9,621.41
6. Step 6: Final answer
   x = 7,786.58