Finding the Fourth Proportional to 5,259.59, 7,258.73 and 3,930.98

Step by Step Solution

1. Step 1: Write the proportion equation
   5,259.59 : 7,258.73 = 3,930.98 : x
2. Step 2: Convert to fraction form
   5,259.59/7,258.73 = 3,930.98/x
3. Step 3: Cross multiply
   5,259.59x = 7,258.73 × 3,930.98
4. Step 4: Simplify right side
   5,259.59x = 28,533,866.51
5. Step 5: Solve for x
   x = 28,533,866.51/5,259.59
6. Step 6: Final answer
   x = 5,425.12