Finding the Fourth Proportional to 5,805.80, 8,001.06 and 5,719.40

Step by Step Solution

1. Step 1: Write the proportion equation
   5,805.80 : 8,001.06 = 5,719.40 : x
2. Step 2: Convert to fraction form
   5,805.80/8,001.06 = 5,719.40/x
3. Step 3: Cross multiply
   5,805.80x = 8,001.06 × 5,719.40
4. Step 4: Simplify right side
   5,805.80x = 45,761,262.56
5. Step 5: Solve for x
   x = 45,761,262.56/5,805.80
6. Step 6: Final answer
   x = 7,881.99