Finding the Fourth Proportional to 11,309.60, 15,590.86 and 7,942.16

Step by Step Solution

1. Step 1: Write the proportion equation
   11,309.60 : 15,590.86 = 7,942.16 : x
2. Step 2: Convert to fraction form
   11,309.60/15,590.86 = 7,942.16/x
3. Step 3: Cross multiply
   11,309.60x = 15,590.86 × 7,942.16
4. Step 4: Simplify right side
   11,309.60x = 123,825,104.66
5. Step 5: Solve for x
   x = 123,825,104.66/11,309.60
6. Step 6: Final answer
   x = 10,948.67