Finding the Fourth Proportional to 1,396.50, 1,930.81 and 1,335.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,396.50 : 1,930.81 = 1,335.30 : x
2. Step 2: Convert to fraction form
   1,396.50/1,930.81 = 1,335.30/x
3. Step 3: Cross multiply
   1,396.50x = 1,930.81 × 1,335.30
4. Step 4: Simplify right side
   1,396.50x = 2,578,210.59
5. Step 5: Solve for x
   x = 2,578,210.59/1,396.50
6. Step 6: Final answer
   x = 1,846.19