Finding the Fourth Proportional to 2,516.81, 3,473.15 and 1,397.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,516.81 : 3,473.15 = 1,397.72 : x
2. Step 2: Convert to fraction form
   2,516.81/3,473.15 = 1,397.72/x
3. Step 3: Cross multiply
   2,516.81x = 3,473.15 × 1,397.72
4. Step 4: Simplify right side
   2,516.81x = 4,854,492.91
5. Step 5: Solve for x
   x = 4,854,492.91/2,516.81
6. Step 6: Final answer
   x = 1,928.83