Finding the Fourth Proportional to 28,066.37, 42,069.41 and 13,998.60

Step by Step Solution

1. Step 1: Write the proportion equation
   28,066.37 : 42,069.41 = 13,998.60 : x
2. Step 2: Convert to fraction form
   28,066.37/42,069.41 = 13,998.60/x
3. Step 3: Cross multiply
   28,066.37x = 42,069.41 × 13,998.60
4. Step 4: Simplify right side
   28,066.37x = 588,912,842.83
5. Step 5: Solve for x
   x = 588,912,842.83/28,066.37
6. Step 6: Final answer
   x = 20,982.87