Finding the Fourth Proportional to 1,667.27, 2,495.47 and 1,228.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.27 : 2,495.47 = 1,228.35 : x
2. Step 2: Convert to fraction form
   1,667.27/2,495.47 = 1,228.35/x
3. Step 3: Cross multiply
   1,667.27x = 2,495.47 × 1,228.35
4. Step 4: Simplify right side
   1,667.27x = 3,065,298.10
5. Step 5: Solve for x
   x = 3,065,298.10/1,667.27
6. Step 6: Final answer
   x = 1,838.51