Finding the Fourth Proportional to 28,443.32, 42,671.84 and 10,674.12

Step by Step Solution

1. Step 1: Write the proportion equation
   28,443.32 : 42,671.84 = 10,674.12 : x
2. Step 2: Convert to fraction form
   28,443.32/42,671.84 = 10,674.12/x
3. Step 3: Cross multiply
   28,443.32x = 42,671.84 × 10,674.12
4. Step 4: Simplify right side
   28,443.32x = 455,484,287.41
5. Step 5: Solve for x
   x = 455,484,287.41/28,443.32
6. Step 6: Final answer
   x = 16,013.76