Finding the Fourth Proportional to 2,672.50, 4,008.27 and 1,211.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,672.50 : 4,008.27 = 1,211.31 : x
2. Step 2: Convert to fraction form
   2,672.50/4,008.27 = 1,211.31/x
3. Step 3: Cross multiply
   2,672.50x = 4,008.27 × 1,211.31
4. Step 4: Simplify right side
   2,672.50x = 4,855,257.53
5. Step 5: Solve for x
   x = 4,855,257.53/2,672.50
6. Step 6: Final answer
   x = 1,816.75