Finding the Fourth Proportional to 28,642.86, 42,953.49 and 16,959.42

Step by Step Solution

1. Step 1: Write the proportion equation
   28,642.86 : 42,953.49 = 16,959.42 : x
2. Step 2: Convert to fraction form
   28,642.86/42,953.49 = 16,959.42/x
3. Step 3: Cross multiply
   28,642.86x = 42,953.49 × 16,959.42
4. Step 4: Simplify right side
   28,642.86x = 728,466,277.38
5. Step 5: Solve for x
   x = 728,466,277.38/28,642.86
6. Step 6: Final answer
   x = 25,432.74