Finding the Fourth Proportional to 9,368.94, 12,929.38 and 5,120.18

Step by Step Solution

1. Step 1: Write the proportion equation
   9,368.94 : 12,929.38 = 5,120.18 : x
2. Step 2: Convert to fraction form
   9,368.94/12,929.38 = 5,120.18/x
3. Step 3: Cross multiply
   9,368.94x = 12,929.38 × 5,120.18
4. Step 4: Simplify right side
   9,368.94x = 66,200,752.89
5. Step 5: Solve for x
   x = 66,200,752.89/9,368.94
6. Step 6: Final answer
   x = 7,065.98