Finding the Fourth Proportional to 9,913.02, 13,679.46 and 5,721

Step by Step Solution

1. Step 1: Write the proportion equation
   9,913.02 : 13,679.46 = 5,721 : x
2. Step 2: Convert to fraction form
   9,913.02/13,679.46 = 5,721/x
3. Step 3: Cross multiply
   9,913.02x = 13,679.46 × 5,721
4. Step 4: Simplify right side
   9,913.02x = 78,260,190.66
5. Step 5: Solve for x
   x = 78,260,190.66/9,913.02
6. Step 6: Final answer
   x = 7,894.69