Finding the Fourth Proportional to 7,150.78, 9,866.46 and 4,318.61

Step by Step Solution

1. Step 1: Write the proportion equation
   7,150.78 : 9,866.46 = 4,318.61 : x
2. Step 2: Convert to fraction form
   7,150.78/9,866.46 = 4,318.61/x
3. Step 3: Cross multiply
   7,150.78x = 9,866.46 × 4,318.61
4. Step 4: Simplify right side
   7,150.78x = 42,609,392.82
5. Step 5: Solve for x
   x = 42,609,392.82/7,150.78
6. Step 6: Final answer
   x = 5,958.71