Finding the Fourth Proportional to 10,185.72, 15,277.89 and 2,790.24

Step by Step Solution

1. Step 1: Write the proportion equation
   10,185.72 : 15,277.89 = 2,790.24 : x
2. Step 2: Convert to fraction form
   10,185.72/15,277.89 = 2,790.24/x
3. Step 3: Cross multiply
   10,185.72x = 15,277.89 × 2,790.24
4. Step 4: Simplify right side
   10,185.72x = 42,628,903.40
5. Step 5: Solve for x
   x = 42,628,903.40/10,185.72
6. Step 6: Final answer
   x = 4,185.17