Finding the Fourth Proportional to 2,499.05, 3,447.47 and 1,615.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,499.05 : 3,447.47 = 1,615.61 : x
2. Step 2: Convert to fraction form
   2,499.05/3,447.47 = 1,615.61/x
3. Step 3: Cross multiply
   2,499.05x = 3,447.47 × 1,615.61
4. Step 4: Simplify right side
   2,499.05x = 5,569,758.93
5. Step 5: Solve for x
   x = 5,569,758.93/2,499.05
6. Step 6: Final answer
   x = 2,228.75