Finding the Fourth Proportional to 28,404.42, 42,612.78 and 10,874.25

Step by Step Solution

1. Step 1: Write the proportion equation
   28,404.42 : 42,612.78 = 10,874.25 : x
2. Step 2: Convert to fraction form
   28,404.42/42,612.78 = 10,874.25/x
3. Step 3: Cross multiply
   28,404.42x = 42,612.78 × 10,874.25
4. Step 4: Simplify right side
   28,404.42x = 463,382,063.69
5. Step 5: Solve for x
   x = 463,382,063.69/28,404.42
6. Step 6: Final answer
   x = 16,313.73