Finding the Fourth Proportional to 9,721.08, 13,410.54 and 5,739.48

Step by Step Solution

1. Step 1: Write the proportion equation
   9,721.08 : 13,410.54 = 5,739.48 : x
2. Step 2: Convert to fraction form
   9,721.08/13,410.54 = 5,739.48/x
3. Step 3: Cross multiply
   9,721.08x = 13,410.54 × 5,739.48
4. Step 4: Simplify right side
   9,721.08x = 76,969,526.12
5. Step 5: Solve for x
   x = 76,969,526.12/9,721.08
6. Step 6: Final answer
   x = 7,917.80