Finding the Fourth Proportional to 9,340.96, 12,891.12 and 5,149.60

Step by Step Solution

1. Step 1: Write the proportion equation
   9,340.96 : 12,891.12 = 5,149.60 : x
2. Step 2: Convert to fraction form
   9,340.96/12,891.12 = 5,149.60/x
3. Step 3: Cross multiply
   9,340.96x = 12,891.12 × 5,149.60
4. Step 4: Simplify right side
   9,340.96x = 66,384,111.55
5. Step 5: Solve for x
   x = 66,384,111.55/9,340.96
6. Step 6: Final answer
   x = 7,106.78