Finding the Fourth Proportional to 9,871.42, 13,622.31 and 5,395.18

Step by Step Solution

1. Step 1: Write the proportion equation
   9,871.42 : 13,622.31 = 5,395.18 : x
2. Step 2: Convert to fraction form
   9,871.42/13,622.31 = 5,395.18/x
3. Step 3: Cross multiply
   9,871.42x = 13,622.31 × 5,395.18
4. Step 4: Simplify right side
   9,871.42x = 73,494,814.47
5. Step 5: Solve for x
   x = 73,494,814.47/9,871.42
6. Step 6: Final answer
   x = 7,445.21