Finding the Fourth Proportional to 7,359.24, 10,155.78 and 4,215.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,359.24 : 10,155.78 = 4,215.72 : x
2. Step 2: Convert to fraction form
   7,359.24/10,155.78 = 4,215.72/x
3. Step 3: Cross multiply
   7,359.24x = 10,155.78 × 4,215.72
4. Step 4: Simplify right side
   7,359.24x = 42,813,924.86
5. Step 5: Solve for x
   x = 42,813,924.86/7,359.24
6. Step 6: Final answer
   x = 5,817.71