Finding the Fourth Proportional to 9,630.84, 13,291.78 and 5,439

Step by Step Solution

1. Step 1: Write the proportion equation
   9,630.84 : 13,291.78 = 5,439 : x
2. Step 2: Convert to fraction form
   9,630.84/13,291.78 = 5,439/x
3. Step 3: Cross multiply
   9,630.84x = 13,291.78 × 5,439
4. Step 4: Simplify right side
   9,630.84x = 72,293,991.42
5. Step 5: Solve for x
   x = 72,293,991.42/9,630.84
6. Step 6: Final answer
   x = 7,506.51