Finding the Fourth Proportional to 1,590.72, 2,190.24 and 1,354.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,590.72 : 2,190.24 = 1,354.20 : x
2. Step 2: Convert to fraction form
   1,590.72/2,190.24 = 1,354.20/x
3. Step 3: Cross multiply
   1,590.72x = 2,190.24 × 1,354.20
4. Step 4: Simplify right side
   1,590.72x = 2,966,023.01
5. Step 5: Solve for x
   x = 2,966,023.01/1,590.72
6. Step 6: Final answer
   x = 1,864.58