Finding the Fourth Proportional to 8,994.18, 12,409.86 and 5,457.30

Step by Step Solution

1. Step 1: Write the proportion equation
   8,994.18 : 12,409.86 = 5,457.30 : x
2. Step 2: Convert to fraction form
   8,994.18/12,409.86 = 5,457.30/x
3. Step 3: Cross multiply
   8,994.18x = 12,409.86 × 5,457.30
4. Step 4: Simplify right side
   8,994.18x = 67,724,328.98
5. Step 5: Solve for x
   x = 67,724,328.98/8,994.18
6. Step 6: Final answer
   x = 7,529.79