Finding the Fourth Proportional to 3,890.62, 5,837.37 and 1,811.74

Step by Step Solution

1. Step 1: Write the proportion equation
   3,890.62 : 5,837.37 = 1,811.74 : x
2. Step 2: Convert to fraction form
   3,890.62/5,837.37 = 1,811.74/x
3. Step 3: Cross multiply
   3,890.62x = 5,837.37 × 1,811.74
4. Step 4: Simplify right side
   3,890.62x = 10,575,796.72
5. Step 5: Solve for x
   x = 10,575,796.72/3,890.62
6. Step 6: Final answer
   x = 2,718.28