Finding the Fourth Proportional to 9,872.48, 13,624.35 and 5,680.73

Step by Step Solution

1. Step 1: Write the proportion equation
   9,872.48 : 13,624.35 = 5,680.73 : x
2. Step 2: Convert to fraction form
   9,872.48/13,624.35 = 5,680.73/x
3. Step 3: Cross multiply
   9,872.48x = 13,624.35 × 5,680.73
4. Step 4: Simplify right side
   9,872.48x = 77,396,253.78
5. Step 5: Solve for x
   x = 77,396,253.78/9,872.48
6. Step 6: Final answer
   x = 7,839.60