Finding the Fourth Proportional to 9,155.31, 12,634.26 and 5,176.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,155.31 : 12,634.26 = 5,176.42 : x
2. Step 2: Convert to fraction form
   9,155.31/12,634.26 = 5,176.42/x
3. Step 3: Cross multiply
   9,155.31x = 12,634.26 × 5,176.42
4. Step 4: Simplify right side
   9,155.31x = 65,400,185.15
5. Step 5: Solve for x
   x = 65,400,185.15/9,155.31
6. Step 6: Final answer
   x = 7,143.42