Finding the Fourth Proportional to 10,579.50, 15,870.16 and 2,788.34

Step by Step Solution

1. Step 1: Write the proportion equation
   10,579.50 : 15,870.16 = 2,788.34 : x
2. Step 2: Convert to fraction form
   10,579.50/15,870.16 = 2,788.34/x
3. Step 3: Cross multiply
   10,579.50x = 15,870.16 × 2,788.34
4. Step 4: Simplify right side
   10,579.50x = 44,251,401.93
5. Step 5: Solve for x
   x = 44,251,401.93/10,579.50
6. Step 6: Final answer
   x = 4,182.75