Finding the Fourth Proportional to 1,321.32, 1,980.72 and 590.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,321.32 : 1,980.72 = 590.49 : x
2. Step 2: Convert to fraction form
   1,321.32/1,980.72 = 590.49/x
3. Step 3: Cross multiply
   1,321.32x = 1,980.72 × 590.49
4. Step 4: Simplify right side
   1,321.32x = 1,169,595.35
5. Step 5: Solve for x
   x = 1,169,595.35/1,321.32
6. Step 6: Final answer
   x = 885.17