Finding the Fourth Proportional to 1,491.06, 2,056.55 and 1,256.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,491.06 : 2,056.55 = 1,256.30 : x
2. Step 2: Convert to fraction form
   1,491.06/2,056.55 = 1,256.30/x
3. Step 3: Cross multiply
   1,491.06x = 2,056.55 × 1,256.30
4. Step 4: Simplify right side
   1,491.06x = 2,583,643.77
5. Step 5: Solve for x
   x = 2,583,643.77/1,491.06
6. Step 6: Final answer
   x = 1,732.76