Finding the Fourth Proportional to 9,439.67, 13,021.83 and 5,661.02

Step by Step Solution

1. Step 1: Write the proportion equation
   9,439.67 : 13,021.83 = 5,661.02 : x
2. Step 2: Convert to fraction form
   9,439.67/13,021.83 = 5,661.02/x
3. Step 3: Cross multiply
   9,439.67x = 13,021.83 × 5,661.02
4. Step 4: Simplify right side
   9,439.67x = 73,716,774.96
5. Step 5: Solve for x
   x = 73,716,774.96/9,439.67
6. Step 6: Final answer
   x = 7,809.26