Finding the Fourth Proportional to 51,019.88, 76,535.55 and 13,581.41

Step by Step Solution

1. Step 1: Write the proportion equation
   51,019.88 : 76,535.55 = 13,581.41 : x
2. Step 2: Convert to fraction form
   51,019.88/76,535.55 = 13,581.41/x
3. Step 3: Cross multiply
   51,019.88x = 76,535.55 × 13,581.41
4. Step 4: Simplify right side
   51,019.88x = 1,039,460,301.45
5. Step 5: Solve for x
   x = 1,039,460,301.45/51,019.88
6. Step 6: Final answer
   x = 20,373.63