Finding the Fourth Proportional to 1,294.07, 1,784.71 and 874.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,294.07 : 1,784.71 = 874.31 : x
2. Step 2: Convert to fraction form
   1,294.07/1,784.71 = 874.31/x
3. Step 3: Cross multiply
   1,294.07x = 1,784.71 × 874.31
4. Step 4: Simplify right side
   1,294.07x = 1,560,389.80
5. Step 5: Solve for x
   x = 1,560,389.80/1,294.07
6. Step 6: Final answer
   x = 1,205.80