Finding the Fourth Proportional to 28,464.72, 42,705.68 and 12,882.48

Step by Step Solution

1. Step 1: Write the proportion equation
   28,464.72 : 42,705.68 = 12,882.48 : x
2. Step 2: Convert to fraction form
   28,464.72/42,705.68 = 12,882.48/x
3. Step 3: Cross multiply
   28,464.72x = 42,705.68 × 12,882.48
4. Step 4: Simplify right side
   28,464.72x = 550,155,068.49
5. Step 5: Solve for x
   x = 550,155,068.49/28,464.72
6. Step 6: Final answer
   x = 19,327.61