Finding the Fourth Proportional to 9,667.80, 13,329.90 and 7,432.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,667.80 : 13,329.90 = 7,432.20 : x
2. Step 2: Convert to fraction form
   9,667.80/13,329.90 = 7,432.20/x
3. Step 3: Cross multiply
   9,667.80x = 13,329.90 × 7,432.20
4. Step 4: Simplify right side
   9,667.80x = 99,070,482.78
5. Step 5: Solve for x
   x = 99,070,482.78/9,667.80
6. Step 6: Final answer
   x = 10,247.47