Finding the Fourth Proportional to 5,279.37, 7,920.39 and 1,581.59

Step by Step Solution

1. Step 1: Write the proportion equation
   5,279.37 : 7,920.39 = 1,581.59 : x
2. Step 2: Convert to fraction form
   5,279.37/7,920.39 = 1,581.59/x
3. Step 3: Cross multiply
   5,279.37x = 7,920.39 × 1,581.59
4. Step 4: Simplify right side
   5,279.37x = 12,526,770.02
5. Step 5: Solve for x
   x = 12,526,770.02/5,279.37
6. Step 6: Final answer
   x = 2,372.78