Finding the Fourth Proportional to 12,960.71, 19,444.71 and 4,196.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,960.71 : 19,444.71 = 4,196.31 : x
2. Step 2: Convert to fraction form
   12,960.71/19,444.71 = 4,196.31/x
3. Step 3: Cross multiply
   12,960.71x = 19,444.71 × 4,196.31
4. Step 4: Simplify right side
   12,960.71x = 81,595,950.23
5. Step 5: Solve for x
   x = 81,595,950.23/12,960.71
6. Step 6: Final answer
   x = 6,295.64