Finding the Fourth Proportional to 9,159.12, 12,637.49 and 5,179.37

Step by Step Solution

1. Step 1: Write the proportion equation
   9,159.12 : 12,637.49 = 5,179.37 : x
2. Step 2: Convert to fraction form
   9,159.12/12,637.49 = 5,179.37/x
3. Step 3: Cross multiply
   9,159.12x = 12,637.49 × 5,179.37
4. Step 4: Simplify right side
   9,159.12x = 65,454,147.50
5. Step 5: Solve for x
   x = 65,454,147.50/9,159.12
6. Step 6: Final answer
   x = 7,146.34