Finding the Fourth Proportional to 13,019.12, 19,552.37 and 12,490.59

Step by Step Solution

1. Step 1: Write the proportion equation
   13,019.12 : 19,552.37 = 12,490.59 : x
2. Step 2: Convert to fraction form
   13,019.12/19,552.37 = 12,490.59/x
3. Step 3: Cross multiply
   13,019.12x = 19,552.37 × 12,490.59
4. Step 4: Simplify right side
   13,019.12x = 244,220,637.20
5. Step 5: Solve for x
   x = 244,220,637.20/13,019.12
6. Step 6: Final answer
   x = 18,758.61