Finding the Fourth Proportional to 10,649.70, 15,975.72 and 2,859.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,649.70 : 15,975.72 = 2,859.12 : x
2. Step 2: Convert to fraction form
   10,649.70/15,975.72 = 2,859.12/x
3. Step 3: Cross multiply
   10,649.70x = 15,975.72 × 2,859.12
4. Step 4: Simplify right side
   10,649.70x = 45,676,500.57
5. Step 5: Solve for x
   x = 45,676,500.57/10,649.70
6. Step 6: Final answer
   x = 4,288.99