Finding the Fourth Proportional to 28,313.10, 42,488.79 and 10,782.47

Step by Step Solution

1. Step 1: Write the proportion equation
   28,313.10 : 42,488.79 = 10,782.47 : x
2. Step 2: Convert to fraction form
   28,313.10/42,488.79 = 10,782.47/x
3. Step 3: Cross multiply
   28,313.10x = 42,488.79 × 10,782.47
4. Step 4: Simplify right side
   28,313.10x = 458,134,103.51
5. Step 5: Solve for x
   x = 458,134,103.51/28,313.10
6. Step 6: Final answer
   x = 16,180.99