Finding the Fourth Proportional to 9,376.82, 12,940.35 and 5,128.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,376.82 : 12,940.35 = 5,128.16 : x
2. Step 2: Convert to fraction form
   9,376.82/12,940.35 = 5,128.16/x
3. Step 3: Cross multiply
   9,376.82x = 12,940.35 × 5,128.16
4. Step 4: Simplify right side
   9,376.82x = 66,360,217.61
5. Step 5: Solve for x
   x = 66,360,217.61/9,376.82
6. Step 6: Final answer
   x = 7,077.05