Finding the Fourth Proportional to 9,399.84, 12,971.79 and 5,208

Step by Step Solution

1. Step 1: Write the proportion equation
   9,399.84 : 12,971.79 = 5,208 : x
2. Step 2: Convert to fraction form
   9,399.84/12,971.79 = 5,208/x
3. Step 3: Cross multiply
   9,399.84x = 12,971.79 × 5,208
4. Step 4: Simplify right side
   9,399.84x = 67,557,082.32
5. Step 5: Solve for x
   x = 67,557,082.32/9,399.84
6. Step 6: Final answer
   x = 7,187.05