Finding the Fourth Proportional to 12,090.27, 16,692.31 and 9,857.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,090.27 : 16,692.31 = 9,857.50 : x
2. Step 2: Convert to fraction form
   12,090.27/16,692.31 = 9,857.50/x
3. Step 3: Cross multiply
   12,090.27x = 16,692.31 × 9,857.50
4. Step 4: Simplify right side
   12,090.27x = 164,544,445.83
5. Step 5: Solve for x
   x = 164,544,445.83/12,090.27
6. Step 6: Final answer
   x = 13,609.66