Finding the Fourth Proportional to 12,871.98, 19,308.78 and 3,512.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,871.98 : 19,308.78 = 3,512.16 : x
2. Step 2: Convert to fraction form
   12,871.98/19,308.78 = 3,512.16/x
3. Step 3: Cross multiply
   12,871.98x = 19,308.78 × 3,512.16
4. Step 4: Simplify right side
   12,871.98x = 67,815,524.76
5. Step 5: Solve for x
   x = 67,815,524.76/12,871.98
6. Step 6: Final answer
   x = 5,268.46