Finding the Fourth Proportional to 1,375.33, 1,898.07 and 786.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,375.33 : 1,898.07 = 786.05 : x
2. Step 2: Convert to fraction form
   1,375.33/1,898.07 = 786.05/x
3. Step 3: Cross multiply
   1,375.33x = 1,898.07 × 786.05
4. Step 4: Simplify right side
   1,375.33x = 1,491,977.92
5. Step 5: Solve for x
   x = 1,491,977.92/1,375.33
6. Step 6: Final answer
   x = 1,084.81