Finding the Fourth Proportional to 5,245.59, 7,223.29 and 5,129.17

Step by Step Solution

1. Step 1: Write the proportion equation
   5,245.59 : 7,223.29 = 5,129.17 : x
2. Step 2: Convert to fraction form
   5,245.59/7,223.29 = 5,129.17/x
3. Step 3: Cross multiply
   5,245.59x = 7,223.29 × 5,129.17
4. Step 4: Simplify right side
   5,245.59x = 37,049,482.37
5. Step 5: Solve for x
   x = 37,049,482.37/5,245.59
6. Step 6: Final answer
   x = 7,062.98