Finding the Fourth Proportional to 1,442.49, 1,990.56 and 845.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,442.49 : 1,990.56 = 845.10 : x
2. Step 2: Convert to fraction form
   1,442.49/1,990.56 = 845.10/x
3. Step 3: Cross multiply
   1,442.49x = 1,990.56 × 845.10
4. Step 4: Simplify right side
   1,442.49x = 1,682,222.26
5. Step 5: Solve for x
   x = 1,682,222.26/1,442.49
6. Step 6: Final answer
   x = 1,166.19