Finding the Fourth Proportional to 28,499.83, 42,754.34 and 8,778.38

Step by Step Solution

1. Step 1: Write the proportion equation
   28,499.83 : 42,754.34 = 8,778.38 : x
2. Step 2: Convert to fraction form
   28,499.83/42,754.34 = 8,778.38/x
3. Step 3: Cross multiply
   28,499.83x = 42,754.34 × 8,778.38
4. Step 4: Simplify right side
   28,499.83x = 375,313,843.17
5. Step 5: Solve for x
   x = 375,313,843.17/28,499.83
6. Step 6: Final answer
   x = 13,168.99