Finding the Fourth Proportional to 5,291.45, 7,300.72 and 4,168.90

Step by Step Solution

1. Step 1: Write the proportion equation
   5,291.45 : 7,300.72 = 4,168.90 : x
2. Step 2: Convert to fraction form
   5,291.45/7,300.72 = 4,168.90/x
3. Step 3: Cross multiply
   5,291.45x = 7,300.72 × 4,168.90
4. Step 4: Simplify right side
   5,291.45x = 30,435,985.95
5. Step 5: Solve for x
   x = 30,435,985.95/5,291.45
6. Step 6: Final answer
   x = 5,751.92