Finding the Fourth Proportional to 28,499.92, 42,754.56 and 8,778.04

Step by Step Solution

1. Step 1: Write the proportion equation
   28,499.92 : 42,754.56 = 8,778.04 : x
2. Step 2: Convert to fraction form
   28,499.92/42,754.56 = 8,778.04/x
3. Step 3: Cross multiply
   28,499.92x = 42,754.56 × 8,778.04
4. Step 4: Simplify right side
   28,499.92x = 375,301,237.86
5. Step 5: Solve for x
   x = 375,301,237.86/28,499.92
6. Step 6: Final answer
   x = 13,168.50