Finding the Fourth Proportional to 5,380.13, 8,014.72 and 5,216.92

Step by Step Solution

1. Step 1: Write the proportion equation
   5,380.13 : 8,014.72 = 5,216.92 : x
2. Step 2: Convert to fraction form
   5,380.13/8,014.72 = 5,216.92/x
3. Step 3: Cross multiply
   5,380.13x = 8,014.72 × 5,216.92
4. Step 4: Simplify right side
   5,380.13x = 41,812,086.90
5. Step 5: Solve for x
   x = 41,812,086.90/5,380.13
6. Step 6: Final answer
   x = 7,771.58