Finding the Fourth Proportional to 5,589.74, 7,713.72 and 3,071.78

Step by Step Solution

1. Step 1: Write the proportion equation
   5,589.74 : 7,713.72 = 3,071.78 : x
2. Step 2: Convert to fraction form
   5,589.74/7,713.72 = 3,071.78/x
3. Step 3: Cross multiply
   5,589.74x = 7,713.72 × 3,071.78
4. Step 4: Simplify right side
   5,589.74x = 23,694,850.82
5. Step 5: Solve for x
   x = 23,694,850.82/5,589.74
6. Step 6: Final answer
   x = 4,238.99