Finding the Fourth Proportional to 9,871.05, 13,621.35 and 5,393.86

Step by Step Solution

1. Step 1: Write the proportion equation
   9,871.05 : 13,621.35 = 5,393.86 : x
2. Step 2: Convert to fraction form
   9,871.05/13,621.35 = 5,393.86/x
3. Step 3: Cross multiply
   9,871.05x = 13,621.35 × 5,393.86
4. Step 4: Simplify right side
   9,871.05x = 73,471,654.91
5. Step 5: Solve for x
   x = 73,471,654.91/9,871.05
6. Step 6: Final answer
   x = 7,443.14