Finding the Fourth Proportional to 10,871.55, 16,304.81 and 5,319.32

Step by Step Solution

1. Step 1: Write the proportion equation
   10,871.55 : 16,304.81 = 5,319.32 : x
2. Step 2: Convert to fraction form
   10,871.55/16,304.81 = 5,319.32/x
3. Step 3: Cross multiply
   10,871.55x = 16,304.81 × 5,319.32
4. Step 4: Simplify right side
   10,871.55x = 86,730,393.81
5. Step 5: Solve for x
   x = 86,730,393.81/10,871.55
6. Step 6: Final answer
   x = 7,977.74