Finding the Fourth Proportional to 28,530.38, 42,799.59 and 8,810.54

Step by Step Solution

1. Step 1: Write the proportion equation
   28,530.38 : 42,799.59 = 8,810.54 : x
2. Step 2: Convert to fraction form
   28,530.38/42,799.59 = 8,810.54/x
3. Step 3: Cross multiply
   28,530.38x = 42,799.59 × 8,810.54
4. Step 4: Simplify right side
   28,530.38x = 377,087,499.68
5. Step 5: Solve for x
   x = 377,087,499.68/28,530.38
6. Step 6: Final answer
   x = 13,217.05