Finding the Fourth Proportional to 3,131.42, 4,321.32 and 1,889.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,131.42 : 4,321.32 = 1,889.42 : x
2. Step 2: Convert to fraction form
   3,131.42/4,321.32 = 1,889.42/x
3. Step 3: Cross multiply
   3,131.42x = 4,321.32 × 1,889.42
4. Step 4: Simplify right side
   3,131.42x = 8,164,788.43
5. Step 5: Solve for x
   x = 8,164,788.43/3,131.42
6. Step 6: Final answer
   x = 2,607.38