Finding the Fourth Proportional to 1,940.31, 2,680.77 and 1,353.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,940.31 : 2,680.77 = 1,353.47 : x
2. Step 2: Convert to fraction form
   1,940.31/2,680.77 = 1,353.47/x
3. Step 3: Cross multiply
   1,940.31x = 2,680.77 × 1,353.47
4. Step 4: Simplify right side
   1,940.31x = 3,628,328.37
5. Step 5: Solve for x
   x = 3,628,328.37/1,940.31
6. Step 6: Final answer
   x = 1,869.97