Finding the Fourth Proportional to 20,665.50, 28,518.32 and 11,234.00

Step by Step Solution

1. Step 1: Write the proportion equation
   20,665.50 : 28,518.32 = 11,234.00 : x
2. Step 2: Convert to fraction form
   20,665.50/28,518.32 = 11,234.00/x
3. Step 3: Cross multiply
   20,665.50x = 28,518.32 × 11,234.00
4. Step 4: Simplify right side
   20,665.50x = 320,374,692.37
5. Step 5: Solve for x
   x = 320,374,692.37/20,665.50
6. Step 6: Final answer
   x = 15,502.88