Finding the Fourth Proportional to 11,699.56, 16,139.40 and 7,922.88

Step by Step Solution

1. Step 1: Write the proportion equation
   11,699.56 : 16,139.40 = 7,922.88 : x
2. Step 2: Convert to fraction form
   11,699.56/16,139.40 = 7,922.88/x
3. Step 3: Cross multiply
   11,699.56x = 16,139.40 × 7,922.88
4. Step 4: Simplify right side
   11,699.56x = 127,870,529.47
5. Step 5: Solve for x
   x = 127,870,529.47/11,699.56
6. Step 6: Final answer
   x = 10,929.52