Finding the Fourth Proportional to 1,141.32, 1,711.98 and 492.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,141.32 : 1,711.98 = 492.78 : x
2. Step 2: Convert to fraction form
   1,141.32/1,711.98 = 492.78/x
3. Step 3: Cross multiply
   1,141.32x = 1,711.98 × 492.78
4. Step 4: Simplify right side
   1,141.32x = 843,629.50
5. Step 5: Solve for x
   x = 843,629.50/1,141.32
6. Step 6: Final answer
   x = 739.17