Finding the Fourth Proportional to 1,760.81, 2,428.92 and 1,256.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,760.81 : 2,428.92 = 1,256.78 : x
2. Step 2: Convert to fraction form
   1,760.81/2,428.92 = 1,256.78/x
3. Step 3: Cross multiply
   1,760.81x = 2,428.92 × 1,256.78
4. Step 4: Simplify right side
   1,760.81x = 3,052,611.25
5. Step 5: Solve for x
   x = 3,052,611.25/1,760.81
6. Step 6: Final answer
   x = 1,733.64