Finding the Fourth Proportional to 2,091.78, 3,131.55 and 1,610.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,091.78 : 3,131.55 = 1,610.46 : x
2. Step 2: Convert to fraction form
   2,091.78/3,131.55 = 1,610.46/x
3. Step 3: Cross multiply
   2,091.78x = 3,131.55 × 1,610.46
4. Step 4: Simplify right side
   2,091.78x = 5,043,236.01
5. Step 5: Solve for x
   x = 5,043,236.01/2,091.78
6. Step 6: Final answer
   x = 2,410.98