Finding the Fourth Proportional to 12,995.31, 19,494.18 and 4,227.87

Step by Step Solution

1. Step 1: Write the proportion equation
   12,995.31 : 19,494.18 = 4,227.87 : x
2. Step 2: Convert to fraction form
   12,995.31/19,494.18 = 4,227.87/x
3. Step 3: Cross multiply
   12,995.31x = 19,494.18 × 4,227.87
4. Step 4: Simplify right side
   12,995.31x = 82,418,858.80
5. Step 5: Solve for x
   x = 82,418,858.80/12,995.31
6. Step 6: Final answer
   x = 6,342.20