Finding the Fourth Proportional to 5,245.58, 7,223.30 and 5,129.18

Step by Step Solution

1. Step 1: Write the proportion equation
   5,245.58 : 7,223.30 = 5,129.18 : x
2. Step 2: Convert to fraction form
   5,245.58/7,223.30 = 5,129.18/x
3. Step 3: Cross multiply
   5,245.58x = 7,223.30 × 5,129.18
4. Step 4: Simplify right side
   5,245.58x = 37,049,605.89
5. Step 5: Solve for x
   x = 37,049,605.89/5,245.58
6. Step 6: Final answer
   x = 7,063.01