Finding the Fourth Proportional to 5,642.43, 8,461.31 and 2,131.83

Step by Step Solution

1. Step 1: Write the proportion equation
   5,642.43 : 8,461.31 = 2,131.83 : x
2. Step 2: Convert to fraction form
   5,642.43/8,461.31 = 2,131.83/x
3. Step 3: Cross multiply
   5,642.43x = 8,461.31 × 2,131.83
4. Step 4: Simplify right side
   5,642.43x = 18,038,063.84
5. Step 5: Solve for x
   x = 18,038,063.84/5,642.43
6. Step 6: Final answer
   x = 3,196.86