Finding the Fourth Proportional to 9,405.33, 12,979.31 and 5,156.58

Step by Step Solution

1. Step 1: Write the proportion equation
   9,405.33 : 12,979.31 = 5,156.58 : x
2. Step 2: Convert to fraction form
   9,405.33/12,979.31 = 5,156.58/x
3. Step 3: Cross multiply
   9,405.33x = 12,979.31 × 5,156.58
4. Step 4: Simplify right side
   9,405.33x = 66,928,800.24
5. Step 5: Solve for x
   x = 66,928,800.24/9,405.33
6. Step 6: Final answer
   x = 7,116.05