Finding the Fourth Proportional to 12,085.56, 16,678.23 and 9,055.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,085.56 : 16,678.23 = 9,055.30 : x
2. Step 2: Convert to fraction form
   12,085.56/16,678.23 = 9,055.30/x
3. Step 3: Cross multiply
   12,085.56x = 16,678.23 × 9,055.30
4. Step 4: Simplify right side
   12,085.56x = 151,026,376.12
5. Step 5: Solve for x
   x = 151,026,376.12/12,085.56
6. Step 6: Final answer
   x = 12,496.43