Finding the Fourth Proportional to 3,171.86, 4,756.56 and 1,223

Step by Step Solution

1. Step 1: Write the proportion equation
   3,171.86 : 4,756.56 = 1,223 : x
2. Step 2: Convert to fraction form
   3,171.86/4,756.56 = 1,223/x
3. Step 3: Cross multiply
   3,171.86x = 4,756.56 × 1,223
4. Step 4: Simplify right side
   3,171.86x = 5,817,272.88
5. Step 5: Solve for x
   x = 5,817,272.88/3,171.86
6. Step 6: Final answer
   x = 1,834.03