Finding the Fourth Proportional to 9,871.51, 13,622.28 and 5,395.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,871.51 : 13,622.28 = 5,395.42 : x
2. Step 2: Convert to fraction form
   9,871.51/13,622.28 = 5,395.42/x
3. Step 3: Cross multiply
   9,871.51x = 13,622.28 × 5,395.42
4. Step 4: Simplify right side
   9,871.51x = 73,497,867.67
5. Step 5: Solve for x
   x = 73,497,867.67/9,871.51
6. Step 6: Final answer
   x = 7,445.45