Finding the Fourth Proportional to 9,416.82, 12,994.72 and 5,439.18

Step by Step Solution

1. Step 1: Write the proportion equation
   9,416.82 : 12,994.72 = 5,439.18 : x
2. Step 2: Convert to fraction form
   9,416.82/12,994.72 = 5,439.18/x
3. Step 3: Cross multiply
   9,416.82x = 12,994.72 × 5,439.18
4. Step 4: Simplify right side
   9,416.82x = 70,680,621.13
5. Step 5: Solve for x
   x = 70,680,621.13/9,416.82
6. Step 6: Final answer
   x = 7,505.78