Finding the Fourth Proportional to 1,081.31, 1,492.89 and 767.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.31 : 1,492.89 = 767.24 : x
2. Step 2: Convert to fraction form
   1,081.31/1,492.89 = 767.24/x
3. Step 3: Cross multiply
   1,081.31x = 1,492.89 × 767.24
4. Step 4: Simplify right side
   1,081.31x = 1,145,404.92
5. Step 5: Solve for x
   x = 1,145,404.92/1,081.31
6. Step 6: Final answer
   x = 1,059.28