Finding the Fourth Proportional to 1,892.65, 2,839.31 and 659.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,892.65 : 2,839.31 = 659.69 : x
2. Step 2: Convert to fraction form
   1,892.65/2,839.31 = 659.69/x
3. Step 3: Cross multiply
   1,892.65x = 2,839.31 × 659.69
4. Step 4: Simplify right side
   1,892.65x = 1,873,061.12
5. Step 5: Solve for x
   x = 1,873,061.12/1,892.65
6. Step 6: Final answer
   x = 989.65