Finding the Fourth Proportional to 9,871.68, 13,622.89 and 5,395.43

Step by Step Solution

1. Step 1: Write the proportion equation
   9,871.68 : 13,622.89 = 5,395.43 : x
2. Step 2: Convert to fraction form
   9,871.68/13,622.89 = 5,395.43/x
3. Step 3: Cross multiply
   9,871.68x = 13,622.89 × 5,395.43
4. Step 4: Simplify right side
   9,871.68x = 73,501,318.88
5. Step 5: Solve for x
   x = 73,501,318.88/9,871.68
6. Step 6: Final answer
   x = 7,445.67