Finding the Fourth Proportional to 14,091.45, 19,446.57 and 7,718.40

Step by Step Solution

1. Step 1: Write the proportion equation
   14,091.45 : 19,446.57 = 7,718.40 : x
2. Step 2: Convert to fraction form
   14,091.45/19,446.57 = 7,718.40/x
3. Step 3: Cross multiply
   14,091.45x = 19,446.57 × 7,718.40
4. Step 4: Simplify right side
   14,091.45x = 150,096,405.89
5. Step 5: Solve for x
   x = 150,096,405.89/14,091.45
6. Step 6: Final answer
   x = 10,651.59