Finding the Fourth Proportional to 2,131.78, 3,193.40 and 1,693.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.78 : 3,193.40 = 1,693.77 : x
2. Step 2: Convert to fraction form
   2,131.78/3,193.40 = 1,693.77/x
3. Step 3: Cross multiply
   2,131.78x = 3,193.40 × 1,693.77
4. Step 4: Simplify right side
   2,131.78x = 5,408,889.35
5. Step 5: Solve for x
   x = 5,408,889.35/2,131.78
6. Step 6: Final answer
   x = 2,537.27