Finding the Fourth Proportional to 9,329.93, 12,874.72 and 5,138.18

Step by Step Solution

1. Step 1: Write the proportion equation
   9,329.93 : 12,874.72 = 5,138.18 : x
2. Step 2: Convert to fraction form
   9,329.93/12,874.72 = 5,138.18/x
3. Step 3: Cross multiply
   9,329.93x = 12,874.72 × 5,138.18
4. Step 4: Simplify right side
   9,329.93x = 66,152,693.94
5. Step 5: Solve for x
   x = 66,152,693.94/9,329.93
6. Step 6: Final answer
   x = 7,090.37