Finding the Fourth Proportional to 9,921.22, 13,691.59 and 5,445.27

Step by Step Solution

1. Step 1: Write the proportion equation
   9,921.22 : 13,691.59 = 5,445.27 : x
2. Step 2: Convert to fraction form
   9,921.22/13,691.59 = 5,445.27/x
3. Step 3: Cross multiply
   9,921.22x = 13,691.59 × 5,445.27
4. Step 4: Simplify right side
   9,921.22x = 74,554,390.67
5. Step 5: Solve for x
   x = 74,554,390.67/9,921.22
6. Step 6: Final answer
   x = 7,514.64