Finding the Fourth Proportional to 10,994.08, 16,478.74 and 5,451.40

Step by Step Solution

1. Step 1: Write the proportion equation
   10,994.08 : 16,478.74 = 5,451.40 : x
2. Step 2: Convert to fraction form
   10,994.08/16,478.74 = 5,451.40/x
3. Step 3: Cross multiply
   10,994.08x = 16,478.74 × 5,451.40
4. Step 4: Simplify right side
   10,994.08x = 89,832,230.65
5. Step 5: Solve for x
   x = 89,832,230.65/10,994.08
6. Step 6: Final answer
   x = 8,170.96