Finding the Fourth Proportional to 2,131.23, 3,185.59 and 1,851.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.23 : 3,185.59 = 1,851.37 : x
2. Step 2: Convert to fraction form
   2,131.23/3,185.59 = 1,851.37/x
3. Step 3: Cross multiply
   2,131.23x = 3,185.59 × 1,851.37
4. Step 4: Simplify right side
   2,131.23x = 5,897,705.76
5. Step 5: Solve for x
   x = 5,897,705.76/2,131.23
6. Step 6: Final answer
   x = 2,767.28