Finding the Fourth Proportional to 12,890.10, 19,337.31 and 4,124.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,890.10 : 19,337.31 = 4,124.82 : x
2. Step 2: Convert to fraction form
   12,890.10/19,337.31 = 4,124.82/x
3. Step 3: Cross multiply
   12,890.10x = 19,337.31 × 4,124.82
4. Step 4: Simplify right side
   12,890.10x = 79,762,923.03
5. Step 5: Solve for x
   x = 79,762,923.03/12,890.10
6. Step 6: Final answer
   x = 6,187.92