Finding the Fourth Proportional to 12,039.48, 18,056.31 and 5,019.59

Step by Step Solution

1. Step 1: Write the proportion equation
   12,039.48 : 18,056.31 = 5,019.59 : x
2. Step 2: Convert to fraction form
   12,039.48/18,056.31 = 5,019.59/x
3. Step 3: Cross multiply
   12,039.48x = 18,056.31 × 5,019.59
4. Step 4: Simplify right side
   12,039.48x = 90,635,182.83
5. Step 5: Solve for x
   x = 90,635,182.83/12,039.48
6. Step 6: Final answer
   x = 7,528.16