Finding the Fourth Proportional to 1,434.90, 1,980.35 and 845.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.90 : 1,980.35 = 845.49 : x
2. Step 2: Convert to fraction form
   1,434.90/1,980.35 = 845.49/x
3. Step 3: Cross multiply
   1,434.90x = 1,980.35 × 845.49
4. Step 4: Simplify right side
   1,434.90x = 1,674,361.89
5. Step 5: Solve for x
   x = 1,674,361.89/1,434.90
6. Step 6: Final answer
   x = 1,166.88