Finding the Fourth Proportional to 28,498.72, 42,757.68 and 8,776.48

Step by Step Solution

1. Step 1: Write the proportion equation
   28,498.72 : 42,757.68 = 8,776.48 : x
2. Step 2: Convert to fraction form
   28,498.72/42,757.68 = 8,776.48/x
3. Step 3: Cross multiply
   28,498.72x = 42,757.68 × 8,776.48
4. Step 4: Simplify right side
   28,498.72x = 375,261,923.37
5. Step 5: Solve for x
   x = 375,261,923.37/28,498.72
6. Step 6: Final answer
   x = 13,167.68