Finding the Fourth Proportional to 8,784.50, 13,160.21 and 4,405.05

Step by Step Solution

1. Step 1: Write the proportion equation
   8,784.50 : 13,160.21 = 4,405.05 : x
2. Step 2: Convert to fraction form
   8,784.50/13,160.21 = 4,405.05/x
3. Step 3: Cross multiply
   8,784.50x = 13,160.21 × 4,405.05
4. Step 4: Simplify right side
   8,784.50x = 57,971,361.04
5. Step 5: Solve for x
   x = 57,971,361.04/8,784.50
6. Step 6: Final answer
   x = 6,599.28