Finding the Fourth Proportional to 9,680.33, 13,358.16 and 5,431.07

Step by Step Solution

1. Step 1: Write the proportion equation
   9,680.33 : 13,358.16 = 5,431.07 : x
2. Step 2: Convert to fraction form
   9,680.33/13,358.16 = 5,431.07/x
3. Step 3: Cross multiply
   9,680.33x = 13,358.16 × 5,431.07
4. Step 4: Simplify right side
   9,680.33x = 72,549,102.03
5. Step 5: Solve for x
   x = 72,549,102.03/9,680.33
6. Step 6: Final answer
   x = 7,494.49