Finding the Fourth Proportional to 1,405.98, 1,940.43 and 846.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,405.98 : 1,940.43 = 846.74 : x
2. Step 2: Convert to fraction form
   1,405.98/1,940.43 = 846.74/x
3. Step 3: Cross multiply
   1,405.98x = 1,940.43 × 846.74
4. Step 4: Simplify right side
   1,405.98x = 1,643,039.70
5. Step 5: Solve for x
   x = 1,643,039.70/1,405.98
6. Step 6: Final answer
   x = 1,168.61