Finding the Fourth Proportional to 12,317.25, 18,480.46 and 7,390.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,317.25 : 18,480.46 = 7,390.42 : x
2. Step 2: Convert to fraction form
   12,317.25/18,480.46 = 7,390.42/x
3. Step 3: Cross multiply
   12,317.25x = 18,480.46 × 7,390.42
4. Step 4: Simplify right side
   12,317.25x = 136,578,342.72
5. Step 5: Solve for x
   x = 136,578,342.72/12,317.25
6. Step 6: Final answer
   x = 11,088.38