Finding the Fourth Proportional to 28,544.05, 42,820.18 and 8,824.15

Step by Step Solution

1. Step 1: Write the proportion equation
   28,544.05 : 42,820.18 = 8,824.15 : x
2. Step 2: Convert to fraction form
   28,544.05/42,820.18 = 8,824.15/x
3. Step 3: Cross multiply
   28,544.05x = 42,820.18 × 8,824.15
4. Step 4: Simplify right side
   28,544.05x = 377,851,639.61
5. Step 5: Solve for x
   x = 377,851,639.61/28,544.05
6. Step 6: Final answer
   x = 13,237.49