Finding the Fourth Proportional to 1,435.41, 1,980.78 and 845.97

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.41 : 1,980.78 = 845.97 : x
2. Step 2: Convert to fraction form
   1,435.41/1,980.78 = 845.97/x
3. Step 3: Cross multiply
   1,435.41x = 1,980.78 × 845.97
4. Step 4: Simplify right side
   1,435.41x = 1,675,680.46
5. Step 5: Solve for x
   x = 1,675,680.46/1,435.41
6. Step 6: Final answer
   x = 1,167.39