Finding the Fourth Proportional to 28,136.10, 42,210.55 and 16,443.30

Step by Step Solution

1. Step 1: Write the proportion equation
   28,136.10 : 42,210.55 = 16,443.30 : x
2. Step 2: Convert to fraction form
   28,136.10/42,210.55 = 16,443.30/x
3. Step 3: Cross multiply
   28,136.10x = 42,210.55 × 16,443.30
4. Step 4: Simplify right side
   28,136.10x = 694,080,736.82
5. Step 5: Solve for x
   x = 694,080,736.82/28,136.10
6. Step 6: Final answer
   x = 24,668.69