Finding the Fourth Proportional to 1,891.37, 2,610.41 and 1,218.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,891.37 : 2,610.41 = 1,218.98 : x
2. Step 2: Convert to fraction form
   1,891.37/2,610.41 = 1,218.98/x
3. Step 3: Cross multiply
   1,891.37x = 2,610.41 × 1,218.98
4. Step 4: Simplify right side
   1,891.37x = 3,182,038.01
5. Step 5: Solve for x
   x = 3,182,038.01/1,891.37
6. Step 6: Final answer
   x = 1,682.40