Finding the Fourth Proportional to 12,709.41, 19,068.69 and 7,721.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,709.41 : 19,068.69 = 7,721.96 : x
2. Step 2: Convert to fraction form
   12,709.41/19,068.69 = 7,721.96/x
3. Step 3: Cross multiply
   12,709.41x = 19,068.69 × 7,721.96
4. Step 4: Simplify right side
   12,709.41x = 147,247,661.43
5. Step 5: Solve for x
   x = 147,247,661.43/12,709.41
6. Step 6: Final answer
   x = 11,585.72