Finding the Fourth Proportional to 11,348.78, 15,659.88 and 7,159.46

Step by Step Solution

1. Step 1: Write the proportion equation
   11,348.78 : 15,659.88 = 7,159.46 : x
2. Step 2: Convert to fraction form
   11,348.78/15,659.88 = 7,159.46/x
3. Step 3: Cross multiply
   11,348.78x = 15,659.88 × 7,159.46
4. Step 4: Simplify right side
   11,348.78x = 112,116,284.46
5. Step 5: Solve for x
   x = 112,116,284.46/11,348.78
6. Step 6: Final answer
   x = 9,879.15