Finding the Fourth Proportional to 7,408.72, 10,216.34 and 5,730.40

Step by Step Solution

1. Step 1: Write the proportion equation
   7,408.72 : 10,216.34 = 5,730.40 : x
2. Step 2: Convert to fraction form
   7,408.72/10,216.34 = 5,730.40/x
3. Step 3: Cross multiply
   7,408.72x = 10,216.34 × 5,730.40
4. Step 4: Simplify right side
   7,408.72x = 58,543,714.74
5. Step 5: Solve for x
   x = 58,543,714.74/7,408.72
6. Step 6: Final answer
   x = 7,902.00