Finding the Fourth Proportional to 1,111.61, 1,668.02 and 837.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.61 : 1,668.02 = 837.02 : x
2. Step 2: Convert to fraction form
   1,111.61/1,668.02 = 837.02/x
3. Step 3: Cross multiply
   1,111.61x = 1,668.02 × 837.02
4. Step 4: Simplify right side
   1,111.61x = 1,396,153.58
5. Step 5: Solve for x
   x = 1,396,153.58/1,111.61
6. Step 6: Final answer
   x = 1,255.98