Finding the Fourth Proportional to 1,638.49, 2,445.86 and 1,516.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,638.49 : 2,445.86 = 1,516.54 : x
2. Step 2: Convert to fraction form
   1,638.49/2,445.86 = 1,516.54/x
3. Step 3: Cross multiply
   1,638.49x = 2,445.86 × 1,516.54
4. Step 4: Simplify right side
   1,638.49x = 3,709,240.73
5. Step 5: Solve for x
   x = 3,709,240.73/1,638.49
6. Step 6: Final answer
   x = 2,263.82