Finding the Fourth Proportional to 9,661.42, 13,333.26 and 5,412.23

Step by Step Solution

1. Step 1: Write the proportion equation
   9,661.42 : 13,333.26 = 5,412.23 : x
2. Step 2: Convert to fraction form
   9,661.42/13,333.26 = 5,412.23/x
3. Step 3: Cross multiply
   9,661.42x = 13,333.26 × 5,412.23
4. Step 4: Simplify right side
   9,661.42x = 72,162,669.77
5. Step 5: Solve for x
   x = 72,162,669.77/9,661.42
6. Step 6: Final answer
   x = 7,469.16