Finding the Fourth Proportional to 2,561.68, 3,534.98 and 1,442.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,561.68 : 3,534.98 = 1,442.58 : x
2. Step 2: Convert to fraction form
   2,561.68/3,534.98 = 1,442.58/x
3. Step 3: Cross multiply
   2,561.68x = 3,534.98 × 1,442.58
4. Step 4: Simplify right side
   2,561.68x = 5,099,495.05
5. Step 5: Solve for x
   x = 5,099,495.05/2,561.68
6. Step 6: Final answer
   x = 1,990.69