Finding the Fourth Proportional to 2,516.78, 3,473.21 and 1,397.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,516.78 : 3,473.21 = 1,397.82 : x
2. Step 2: Convert to fraction form
   2,516.78/3,473.21 = 1,397.82/x
3. Step 3: Cross multiply
   2,516.78x = 3,473.21 × 1,397.82
4. Step 4: Simplify right side
   2,516.78x = 4,854,924.10
5. Step 5: Solve for x
   x = 4,854,924.10/2,516.78
6. Step 6: Final answer
   x = 1,929.02