Finding the Fourth Proportional to 5,311.58, 7,927.20 and 5,173.34

Step by Step Solution

1. Step 1: Write the proportion equation
   5,311.58 : 7,927.20 = 5,173.34 : x
2. Step 2: Convert to fraction form
   5,311.58/7,927.20 = 5,173.34/x
3. Step 3: Cross multiply
   5,311.58x = 7,927.20 × 5,173.34
4. Step 4: Simplify right side
   5,311.58x = 41,010,074.98
5. Step 5: Solve for x
   x = 41,010,074.98/5,311.58
6. Step 6: Final answer
   x = 7,720.88