Finding the Fourth Proportional to 2,516.44, 3,472.17 and 1,521.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,516.44 : 3,472.17 = 1,521.78 : x
2. Step 2: Convert to fraction form
   2,516.44/3,472.17 = 1,521.78/x
3. Step 3: Cross multiply
   2,516.44x = 3,472.17 × 1,521.78
4. Step 4: Simplify right side
   2,516.44x = 5,283,878.86
5. Step 5: Solve for x
   x = 5,283,878.86/2,516.44
6. Step 6: Final answer
   x = 2,099.74