Finding the Fourth Proportional to 5,171.91, 7,145.60 and 3,606.99

Step by Step Solution

1. Step 1: Write the proportion equation
   5,171.91 : 7,145.60 = 3,606.99 : x
2. Step 2: Convert to fraction form
   5,171.91/7,145.60 = 3,606.99/x
3. Step 3: Cross multiply
   5,171.91x = 7,145.60 × 3,606.99
4. Step 4: Simplify right side
   5,171.91x = 25,774,089.71
5. Step 5: Solve for x
   x = 25,774,089.71/5,171.91
6. Step 6: Final answer
   x = 4,983.48