Finding the Fourth Proportional to 1,375.67, 1,898.43 and 786.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,375.67 : 1,898.43 = 786.23 : x
2. Step 2: Convert to fraction form
   1,375.67/1,898.43 = 786.23/x
3. Step 3: Cross multiply
   1,375.67x = 1,898.43 × 786.23
4. Step 4: Simplify right side
   1,375.67x = 1,492,602.62
5. Step 5: Solve for x
   x = 1,492,602.62/1,375.67
6. Step 6: Final answer
   x = 1,085.00