Finding the Fourth Proportional to 12,009.16, 18,017.61 and 4,992.58

Step by Step Solution

1. Step 1: Write the proportion equation
   12,009.16 : 18,017.61 = 4,992.58 : x
2. Step 2: Convert to fraction form
   12,009.16/18,017.61 = 4,992.58/x
3. Step 3: Cross multiply
   12,009.16x = 18,017.61 × 4,992.58
4. Step 4: Simplify right side
   12,009.16x = 89,954,359.33
5. Step 5: Solve for x
   x = 89,954,359.33/12,009.16
6. Step 6: Final answer
   x = 7,490.48