Finding the Fourth Proportional to 1,783.94, 2,665.58 and 1,287.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,783.94 : 2,665.58 = 1,287.99 : x
2. Step 2: Convert to fraction form
   1,783.94/2,665.58 = 1,287.99/x
3. Step 3: Cross multiply
   1,783.94x = 2,665.58 × 1,287.99
4. Step 4: Simplify right side
   1,783.94x = 3,433,227.06
5. Step 5: Solve for x
   x = 3,433,227.06/1,783.94
6. Step 6: Final answer
   x = 1,924.52