Finding the Fourth Proportional to 12,087.60, 18,131.16 and 7,953.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,087.60 : 18,131.16 = 7,953.72 : x
2. Step 2: Convert to fraction form
   12,087.60/18,131.16 = 7,953.72/x
3. Step 3: Cross multiply
   12,087.60x = 18,131.16 × 7,953.72
4. Step 4: Simplify right side
   12,087.60x = 144,210,169.92
5. Step 5: Solve for x
   x = 144,210,169.92/12,087.60
6. Step 6: Final answer
   x = 11,930.42