Finding the Fourth Proportional to 12,999.84, 17,939.61 and 7,411.92

Step by Step Solution

1. Step 1: Write the proportion equation
   12,999.84 : 17,939.61 = 7,411.92 : x
2. Step 2: Convert to fraction form
   12,999.84/17,939.61 = 7,411.92/x
3. Step 3: Cross multiply
   12,999.84x = 17,939.61 × 7,411.92
4. Step 4: Simplify right side
   12,999.84x = 132,966,954.15
5. Step 5: Solve for x
   x = 132,966,954.15/12,999.84
6. Step 6: Final answer
   x = 10,228.35