Finding the Fourth Proportional to 1,978.93, 2,965.28 and 1,669.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.93 : 2,965.28 = 1,669.33 : x
2. Step 2: Convert to fraction form
   1,978.93/2,965.28 = 1,669.33/x
3. Step 3: Cross multiply
   1,978.93x = 2,965.28 × 1,669.33
4. Step 4: Simplify right side
   1,978.93x = 4,950,048.65
5. Step 5: Solve for x
   x = 4,950,048.65/1,978.93
6. Step 6: Final answer
   x = 2,501.37