Finding the Fourth Proportional to 1,406.39, 1,939.82 and 874.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,406.39 : 1,939.82 = 874.82 : x
2. Step 2: Convert to fraction form
   1,406.39/1,939.82 = 874.82/x
3. Step 3: Cross multiply
   1,406.39x = 1,939.82 × 874.82
4. Step 4: Simplify right side
   1,406.39x = 1,696,993.81
5. Step 5: Solve for x
   x = 1,696,993.81/1,406.39
6. Step 6: Final answer
   x = 1,206.64