Finding the Fourth Proportional to 1,434.68, 1,980.25 and 845.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.68 : 1,980.25 = 845.41 : x
2. Step 2: Convert to fraction form
   1,434.68/1,980.25 = 845.41/x
3. Step 3: Cross multiply
   1,434.68x = 1,980.25 × 845.41
4. Step 4: Simplify right side
   1,434.68x = 1,674,123.15
5. Step 5: Solve for x
   x = 1,674,123.15/1,434.68
6. Step 6: Final answer
   x = 1,166.90