Finding the Fourth Proportional to 1,081.70, 1,492.91 and 683.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.70 : 1,492.91 = 683.69 : x
2. Step 2: Convert to fraction form
   1,081.70/1,492.91 = 683.69/x
3. Step 3: Cross multiply
   1,081.70x = 1,492.91 × 683.69
4. Step 4: Simplify right side
   1,081.70x = 1,020,676.75
5. Step 5: Solve for x
   x = 1,020,676.75/1,081.70
6. Step 6: Final answer
   x = 943.59