Finding the Fourth Proportional to 9,871.95, 13,623.12 and 5,395.62

Step by Step Solution

1. Step 1: Write the proportion equation
   9,871.95 : 13,623.12 = 5,395.62 : x
2. Step 2: Convert to fraction form
   9,871.95/13,623.12 = 5,395.62/x
3. Step 3: Cross multiply
   9,871.95x = 13,623.12 × 5,395.62
4. Step 4: Simplify right side
   9,871.95x = 73,505,178.73
5. Step 5: Solve for x
   x = 73,505,178.73/9,871.95
6. Step 6: Final answer
   x = 7,445.86