Finding the Fourth Proportional to 1,375.74, 1,897.74 and 786.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,375.74 : 1,897.74 = 786.15 : x
2. Step 2: Convert to fraction form
   1,375.74/1,897.74 = 786.15/x
3. Step 3: Cross multiply
   1,375.74x = 1,897.74 × 786.15
4. Step 4: Simplify right side
   1,375.74x = 1,491,908.30
5. Step 5: Solve for x
   x = 1,491,908.30/1,375.74
6. Step 6: Final answer
   x = 1,084.44