Finding the Fourth Proportional to 1,434.87, 1,980.05 and 845.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.87 : 1,980.05 = 845.46 : x
2. Step 2: Convert to fraction form
   1,434.87/1,980.05 = 845.46/x
3. Step 3: Cross multiply
   1,434.87x = 1,980.05 × 845.46
4. Step 4: Simplify right side
   1,434.87x = 1,674,048.85
5. Step 5: Solve for x
   x = 1,674,048.85/1,434.87
6. Step 6: Final answer
   x = 1,166.69