Finding the Fourth Proportional to 12,086.64, 18,126.96 and 3,321.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,086.64 : 18,126.96 = 3,321.12 : x
2. Step 2: Convert to fraction form
   12,086.64/18,126.96 = 3,321.12/x
3. Step 3: Cross multiply
   12,086.64x = 18,126.96 × 3,321.12
4. Step 4: Simplify right side
   12,086.64x = 60,201,809.40
5. Step 5: Solve for x
   x = 60,201,809.40/12,086.64
6. Step 6: Final answer
   x = 4,980.86