Finding the Fourth Proportional to 3,992.78, 5,510.03 and 2,315.16

Step by Step Solution

1. Step 1: Write the proportion equation
   3,992.78 : 5,510.03 = 2,315.16 : x
2. Step 2: Convert to fraction form
   3,992.78/5,510.03 = 2,315.16/x
3. Step 3: Cross multiply
   3,992.78x = 5,510.03 × 2,315.16
4. Step 4: Simplify right side
   3,992.78x = 12,756,602.50
5. Step 5: Solve for x
   x = 12,756,602.50/3,992.78
6. Step 6: Final answer
   x = 3,194.92