Finding the Fourth Proportional to 1,642.74, 2,268.82 and 1,274.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,642.74 : 2,268.82 = 1,274.18 : x
2. Step 2: Convert to fraction form
   1,642.74/2,268.82 = 1,274.18/x
3. Step 3: Cross multiply
   1,642.74x = 2,268.82 × 1,274.18
4. Step 4: Simplify right side
   1,642.74x = 2,890,885.07
5. Step 5: Solve for x
   x = 2,890,885.07/1,642.74
6. Step 6: Final answer
   x = 1,759.79