Finding the Fourth Proportional to 2,516.49, 3,472.86 and 1,521.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,516.49 : 3,472.86 = 1,521.57 : x
2. Step 2: Convert to fraction form
   2,516.49/3,472.86 = 1,521.57/x
3. Step 3: Cross multiply
   2,516.49x = 3,472.86 × 1,521.57
4. Step 4: Simplify right side
   2,516.49x = 5,284,199.59
5. Step 5: Solve for x
   x = 5,284,199.59/2,516.49
6. Step 6: Final answer
   x = 2,099.83