Finding the Fourth Proportional to 1,375.62, 1,898.68 and 786.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,375.62 : 1,898.68 = 786.49 : x
2. Step 2: Convert to fraction form
   1,375.62/1,898.68 = 786.49/x
3. Step 3: Cross multiply
   1,375.62x = 1,898.68 × 786.49
4. Step 4: Simplify right side
   1,375.62x = 1,493,292.83
5. Step 5: Solve for x
   x = 1,493,292.83/1,375.62
6. Step 6: Final answer
   x = 1,085.54