Finding the Fourth Proportional to 7,489.81, 10,335.82 and 4,086.79

Step by Step Solution

1. Step 1: Write the proportion equation
   7,489.81 : 10,335.82 = 4,086.79 : x
2. Step 2: Convert to fraction form
   7,489.81/10,335.82 = 4,086.79/x
3. Step 3: Cross multiply
   7,489.81x = 10,335.82 × 4,086.79
4. Step 4: Simplify right side
   7,489.81x = 42,240,325.82
5. Step 5: Solve for x
   x = 42,240,325.82/7,489.81
6. Step 6: Final answer
   x = 5,639.71