Finding the Fourth Proportional to 11,826.09, 16,320.15 and 7,840.08

Step by Step Solution

1. Step 1: Write the proportion equation
   11,826.09 : 16,320.15 = 7,840.08 : x
2. Step 2: Convert to fraction form
   11,826.09/16,320.15 = 7,840.08/x
3. Step 3: Cross multiply
   11,826.09x = 16,320.15 × 7,840.08
4. Step 4: Simplify right side
   11,826.09x = 127,951,281.61
5. Step 5: Solve for x
   x = 127,951,281.61/11,826.09
6. Step 6: Final answer
   x = 10,819.41