Finding the Fourth Proportional to 10,959.80, 15,111.34 and 7,605.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,959.80 : 15,111.34 = 7,605.50 : x
2. Step 2: Convert to fraction form
   10,959.80/15,111.34 = 7,605.50/x
3. Step 3: Cross multiply
   10,959.80x = 15,111.34 × 7,605.50
4. Step 4: Simplify right side
   10,959.80x = 114,929,296.37
5. Step 5: Solve for x
   x = 114,929,296.37/10,959.80
6. Step 6: Final answer
   x = 10,486.44