Finding the Fourth Proportional to 12,456.23, 18,686.22 and 4,019.91

Step by Step Solution

1. Step 1: Write the proportion equation
   12,456.23 : 18,686.22 = 4,019.91 : x
2. Step 2: Convert to fraction form
   12,456.23/18,686.22 = 4,019.91/x
3. Step 3: Cross multiply
   12,456.23x = 18,686.22 × 4,019.91
4. Step 4: Simplify right side
   12,456.23x = 75,116,964.96
5. Step 5: Solve for x
   x = 75,116,964.96/12,456.23
6. Step 6: Final answer
   x = 6,030.48