Finding the Fourth Proportional to 9,580.84, 13,221.48 and 5,389

Step by Step Solution

1. Step 1: Write the proportion equation
   9,580.84 : 13,221.48 = 5,389 : x
2. Step 2: Convert to fraction form
   9,580.84/13,221.48 = 5,389/x
3. Step 3: Cross multiply
   9,580.84x = 13,221.48 × 5,389
4. Step 4: Simplify right side
   9,580.84x = 71,250,555.72
5. Step 5: Solve for x
   x = 71,250,555.72/9,580.84
6. Step 6: Final answer
   x = 7,436.78