Finding the Fourth Proportional to 12,963.10, 19,447.72 and 4,198.00

Step by Step Solution

1. Step 1: Write the proportion equation
   12,963.10 : 19,447.72 = 4,198.00 : x
2. Step 2: Convert to fraction form
   12,963.10/19,447.72 = 4,198.00/x
3. Step 3: Cross multiply
   12,963.10x = 19,447.72 × 4,198.00
4. Step 4: Simplify right side
   12,963.10x = 81,641,431.32
5. Step 5: Solve for x
   x = 81,641,431.32/12,963.10
6. Step 6: Final answer
   x = 6,297.99