Finding the Fourth Proportional to 28,671.01, 42,995.57 and 13,675.48

Step by Step Solution

1. Step 1: Write the proportion equation
   28,671.01 : 42,995.57 = 13,675.48 : x
2. Step 2: Convert to fraction form
   28,671.01/42,995.57 = 13,675.48/x
3. Step 3: Cross multiply
   28,671.01x = 42,995.57 × 13,675.48
4. Step 4: Simplify right side
   28,671.01x = 587,984,774.27
5. Step 5: Solve for x
   x = 587,984,774.27/28,671.01
6. Step 6: Final answer
   x = 20,507.99