Finding the Fourth Proportional to 9,842.20, 13,581.92 and 5,365.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,842.20 : 13,581.92 = 5,365.88 : x
2. Step 2: Convert to fraction form
   9,842.20/13,581.92 = 5,365.88/x
3. Step 3: Cross multiply
   9,842.20x = 13,581.92 × 5,365.88
4. Step 4: Simplify right side
   9,842.20x = 72,878,952.89
5. Step 5: Solve for x
   x = 72,878,952.89/9,842.20
6. Step 6: Final answer
   x = 7,404.74