Finding the Fourth Proportional to 4,803.72, 7,187.72 and 4,215.96

Step by Step Solution

1. Step 1: Write the proportion equation
   4,803.72 : 7,187.72 = 4,215.96 : x
2. Step 2: Convert to fraction form
   4,803.72/7,187.72 = 4,215.96/x
3. Step 3: Cross multiply
   4,803.72x = 7,187.72 × 4,215.96
4. Step 4: Simplify right side
   4,803.72x = 30,303,140.01
5. Step 5: Solve for x
   x = 30,303,140.01/4,803.72
6. Step 6: Final answer
   x = 6,308.27