Finding the Fourth Proportional to 9,158.81, 12,639.20 and 4,967.06

Step by Step Solution

1. Step 1: Write the proportion equation
   9,158.81 : 12,639.20 = 4,967.06 : x
2. Step 2: Convert to fraction form
   9,158.81/12,639.20 = 4,967.06/x
3. Step 3: Cross multiply
   9,158.81x = 12,639.20 × 4,967.06
4. Step 4: Simplify right side
   9,158.81x = 62,779,576.72
5. Step 5: Solve for x
   x = 62,779,576.72/9,158.81
6. Step 6: Final answer
   x = 6,854.56