Finding the Fourth Proportional to 12,009.60, 18,012.12 and 5,088.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,009.60 : 18,012.12 = 5,088.96 : x
2. Step 2: Convert to fraction form
   12,009.60/18,012.12 = 5,088.96/x
3. Step 3: Cross multiply
   12,009.60x = 18,012.12 × 5,088.96
4. Step 4: Simplify right side
   12,009.60x = 91,662,958.20
5. Step 5: Solve for x
   x = 91,662,958.20/12,009.60
6. Step 6: Final answer
   x = 7,632.47