Finding the Fourth Proportional to 2,176.72, 3,004.68 and 1,590.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,176.72 : 3,004.68 = 1,590.28 : x
2. Step 2: Convert to fraction form
   2,176.72/3,004.68 = 1,590.28/x
3. Step 3: Cross multiply
   2,176.72x = 3,004.68 × 1,590.28
4. Step 4: Simplify right side
   2,176.72x = 4,778,282.51
5. Step 5: Solve for x
   x = 4,778,282.51/2,176.72
6. Step 6: Final answer
   x = 2,195.18