Finding the Fourth Proportional to 1,375.65, 1,898.53 and 786.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,375.65 : 1,898.53 = 786.27 : x
2. Step 2: Convert to fraction form
   1,375.65/1,898.53 = 786.27/x
3. Step 3: Cross multiply
   1,375.65x = 1,898.53 × 786.27
4. Step 4: Simplify right side
   1,375.65x = 1,492,757.18
5. Step 5: Solve for x
   x = 1,492,757.18/1,375.65
6. Step 6: Final answer
   x = 1,085.13