Finding the Fourth Proportional to 2,154.57, 3,223.71 and 1,277.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,154.57 : 3,223.71 = 1,277.55 : x
2. Step 2: Convert to fraction form
   2,154.57/3,223.71 = 1,277.55/x
3. Step 3: Cross multiply
   2,154.57x = 3,223.71 × 1,277.55
4. Step 4: Simplify right side
   2,154.57x = 4,118,450.71
5. Step 5: Solve for x
   x = 4,118,450.71/2,154.57
6. Step 6: Final answer
   x = 1,911.50