Finding the Fourth Proportional to 9,724.73, 13,419.57 and 5,746.21

Step by Step Solution

1. Step 1: Write the proportion equation
   9,724.73 : 13,419.57 = 5,746.21 : x
2. Step 2: Convert to fraction form
   9,724.73/13,419.57 = 5,746.21/x
3. Step 3: Cross multiply
   9,724.73x = 13,419.57 × 5,746.21
4. Step 4: Simplify right side
   9,724.73x = 77,111,655.33
5. Step 5: Solve for x
   x = 77,111,655.33/9,724.73
6. Step 6: Final answer
   x = 7,929.44