Finding the Fourth Proportional to 1,913.97, 2,642.37 and 1,285.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,913.97 : 2,642.37 = 1,285.62 : x
2. Step 2: Convert to fraction form
   1,913.97/2,642.37 = 1,285.62/x
3. Step 3: Cross multiply
   1,913.97x = 2,642.37 × 1,285.62
4. Step 4: Simplify right side
   1,913.97x = 3,397,083.72
5. Step 5: Solve for x
   x = 3,397,083.72/1,913.97
6. Step 6: Final answer
   x = 1,774.89