Finding the Fourth Proportional to 1,375.80, 1,898.28 and 786.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,375.80 : 1,898.28 = 786.03 : x
2. Step 2: Convert to fraction form
   1,375.80/1,898.28 = 786.03/x
3. Step 3: Cross multiply
   1,375.80x = 1,898.28 × 786.03
4. Step 4: Simplify right side
   1,375.80x = 1,492,105.03
5. Step 5: Solve for x
   x = 1,492,105.03/1,375.80
6. Step 6: Final answer
   x = 1,084.54