Finding the Fourth Proportional to 12,877.98, 19,317.78 and 3,518.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,877.98 : 19,317.78 = 3,518.16 : x
2. Step 2: Convert to fraction form
   12,877.98/19,317.78 = 3,518.16/x
3. Step 3: Cross multiply
   12,877.98x = 19,317.78 × 3,518.16
4. Step 4: Simplify right side
   12,877.98x = 67,963,040.88
5. Step 5: Solve for x
   x = 67,963,040.88/12,877.98
6. Step 6: Final answer
   x = 5,277.46