Finding the Fourth Proportional to 28,605.96, 42,914.34 and 8,879.94

Step by Step Solution

1. Step 1: Write the proportion equation
   28,605.96 : 42,914.34 = 8,879.94 : x
2. Step 2: Convert to fraction form
   28,605.96/42,914.34 = 8,879.94/x
3. Step 3: Cross multiply
   28,605.96x = 42,914.34 × 8,879.94
4. Step 4: Simplify right side
   28,605.96x = 381,076,764.34
5. Step 5: Solve for x
   x = 381,076,764.34/28,605.96
6. Step 6: Final answer
   x = 13,321.59