Finding the Fourth Proportional to 28,667.18, 39,558.54 and 16,089.50

Step by Step Solution

1. Step 1: Write the proportion equation
   28,667.18 : 39,558.54 = 16,089.50 : x
2. Step 2: Convert to fraction form
   28,667.18/39,558.54 = 16,089.50/x
3. Step 3: Cross multiply
   28,667.18x = 39,558.54 × 16,089.50
4. Step 4: Simplify right side
   28,667.18x = 636,477,129.33
5. Step 5: Solve for x
   x = 636,477,129.33/28,667.18
6. Step 6: Final answer
   x = 22,202.29