Finding the Fourth Proportional to 10,187.86, 15,280.15 and 2,790.59

Step by Step Solution

1. Step 1: Write the proportion equation
   10,187.86 : 15,280.15 = 2,790.59 : x
2. Step 2: Convert to fraction form
   10,187.86/15,280.15 = 2,790.59/x
3. Step 3: Cross multiply
   10,187.86x = 15,280.15 × 2,790.59
4. Step 4: Simplify right side
   10,187.86x = 42,640,578.06
5. Step 5: Solve for x
   x = 42,640,578.06/10,187.86
6. Step 6: Final answer
   x = 4,185.43