Finding the Fourth Proportional to 28,456.99, 42,687.54 and 10,926.81

Step by Step Solution

1. Step 1: Write the proportion equation
   28,456.99 : 42,687.54 = 10,926.81 : x
2. Step 2: Convert to fraction form
   28,456.99/42,687.54 = 10,926.81/x
3. Step 3: Cross multiply
   28,456.99x = 42,687.54 × 10,926.81
4. Step 4: Simplify right side
   28,456.99x = 466,438,638.95
5. Step 5: Solve for x
   x = 466,438,638.95/28,456.99
6. Step 6: Final answer
   x = 16,391.01