Finding the Fourth Proportional to 28,676.56, 42,969.42 and 22,118.80

Step by Step Solution

1. Step 1: Write the proportion equation
   28,676.56 : 42,969.42 = 22,118.80 : x
2. Step 2: Convert to fraction form
   28,676.56/42,969.42 = 22,118.80/x
3. Step 3: Cross multiply
   28,676.56x = 42,969.42 × 22,118.80
4. Step 4: Simplify right side
   28,676.56x = 950,432,007.10
5. Step 5: Solve for x
   x = 950,432,007.10/28,676.56
6. Step 6: Final answer
   x = 33,143.17