Finding the Fourth Proportional to 1,940.84, 2,911.72 and 1,397.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,940.84 : 2,911.72 = 1,397.12 : x
2. Step 2: Convert to fraction form
   1,940.84/2,911.72 = 1,397.12/x
3. Step 3: Cross multiply
   1,940.84x = 2,911.72 × 1,397.12
4. Step 4: Simplify right side
   1,940.84x = 4,068,022.25
5. Step 5: Solve for x
   x = 4,068,022.25/1,940.84
6. Step 6: Final answer
   x = 2,096.01