Finding the Fourth Proportional to 12,085.37, 16,669.40 and 8,507.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,085.37 : 16,669.40 = 8,507.78 : x
2. Step 2: Convert to fraction form
   12,085.37/16,669.40 = 8,507.78/x
3. Step 3: Cross multiply
   12,085.37x = 16,669.40 × 8,507.78
4. Step 4: Simplify right side
   12,085.37x = 141,819,462.05
5. Step 5: Solve for x
   x = 141,819,462.05/12,085.37
6. Step 6: Final answer
   x = 11,734.81