Finding the Fourth Proportional to 5,606.39, 7,680.79 and 5,396.19

Step by Step Solution

1. Step 1: Write the proportion equation
   5,606.39 : 7,680.79 = 5,396.19 : x
2. Step 2: Convert to fraction form
   5,606.39/7,680.79 = 5,396.19/x
3. Step 3: Cross multiply
   5,606.39x = 7,680.79 × 5,396.19
4. Step 4: Simplify right side
   5,606.39x = 41,447,002.19
5. Step 5: Solve for x
   x = 41,447,002.19/5,606.39
6. Step 6: Final answer
   x = 7,392.81