Finding the Fourth Proportional to 5,259.65, 7,258.83 and 3,931.05

Step by Step Solution

1. Step 1: Write the proportion equation
   5,259.65 : 7,258.83 = 3,931.05 : x
2. Step 2: Convert to fraction form
   5,259.65/7,258.83 = 3,931.05/x
3. Step 3: Cross multiply
   5,259.65x = 7,258.83 × 3,931.05
4. Step 4: Simplify right side
   5,259.65x = 28,534,823.67
5. Step 5: Solve for x
   x = 28,534,823.67/5,259.65
6. Step 6: Final answer
   x = 5,425.23