Finding the Fourth Proportional to 28,673.34, 42,978.96 and 12,042.42

Step by Step Solution

1. Step 1: Write the proportion equation
   28,673.34 : 42,978.96 = 12,042.42 : x
2. Step 2: Convert to fraction form
   28,673.34/42,978.96 = 12,042.42/x
3. Step 3: Cross multiply
   28,673.34x = 42,978.96 × 12,042.42
4. Step 4: Simplify right side
   28,673.34x = 517,570,687.48
5. Step 5: Solve for x
   x = 517,570,687.48/28,673.34
6. Step 6: Final answer
   x = 18,050.59