Finding the Fourth Proportional to 1,983.49, 2,978.07 and 1,764.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,983.49 : 2,978.07 = 1,764.79 : x
2. Step 2: Convert to fraction form
   1,983.49/2,978.07 = 1,764.79/x
3. Step 3: Cross multiply
   1,983.49x = 2,978.07 × 1,764.79
4. Step 4: Simplify right side
   1,983.49x = 5,255,668.16
5. Step 5: Solve for x
   x = 5,255,668.16/1,983.49
6. Step 6: Final answer
   x = 2,649.71