Finding the Fourth Proportional to 1,375.95, 1,898.81 and 786.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,375.95 : 1,898.81 = 786.50 : x
2. Step 2: Convert to fraction form
   1,375.95/1,898.81 = 786.50/x
3. Step 3: Cross multiply
   1,375.95x = 1,898.81 × 786.50
4. Step 4: Simplify right side
   1,375.95x = 1,493,414.73
5. Step 5: Solve for x
   x = 1,493,414.73/1,375.95
6. Step 6: Final answer
   x = 1,085.37