Finding the Fourth Proportional to 8,648.43, 11,933.25 and 4,870.79

Step by Step Solution

1. Step 1: Write the proportion equation
   8,648.43 : 11,933.25 = 4,870.79 : x
2. Step 2: Convert to fraction form
   8,648.43/11,933.25 = 4,870.79/x
3. Step 3: Cross multiply
   8,648.43x = 11,933.25 × 4,870.79
4. Step 4: Simplify right side
   8,648.43x = 58,124,318.50
5. Step 5: Solve for x
   x = 58,124,318.50/8,648.43
6. Step 6: Final answer
   x = 6,720.79