Finding the Fourth Proportional to 51,015.89, 76,516.52 and 13,579.25

Step by Step Solution

1. Step 1: Write the proportion equation
   51,015.89 : 76,516.52 = 13,579.25 : x
2. Step 2: Convert to fraction form
   51,015.89/76,516.52 = 13,579.25/x
3. Step 3: Cross multiply
   51,015.89x = 76,516.52 × 13,579.25
4. Step 4: Simplify right side
   51,015.89x = 1,039,036,503.73
5. Step 5: Solve for x
   x = 1,039,036,503.73/51,015.89
6. Step 6: Final answer
   x = 20,366.92