Finding the Fourth Proportional to 28,456.23, 42,686.42 and 10,926.06

Step by Step Solution

1. Step 1: Write the proportion equation
   28,456.23 : 42,686.42 = 10,926.06 : x
2. Step 2: Convert to fraction form
   28,456.23/42,686.42 = 10,926.06/x
3. Step 3: Cross multiply
   28,456.23x = 42,686.42 × 10,926.06
4. Step 4: Simplify right side
   28,456.23x = 466,394,331.47
5. Step 5: Solve for x
   x = 466,394,331.47/28,456.23
6. Step 6: Final answer
   x = 16,389.88