Finding the Fourth Proportional to 10,911.20, 16,340.88 and 7,783.52

Step by Step Solution

1. Step 1: Write the proportion equation
   10,911.20 : 16,340.88 = 7,783.52 : x
2. Step 2: Convert to fraction form
   10,911.20/16,340.88 = 7,783.52/x
3. Step 3: Cross multiply
   10,911.20x = 16,340.88 × 7,783.52
4. Step 4: Simplify right side
   10,911.20x = 127,189,566.30
5. Step 5: Solve for x
   x = 127,189,566.30/10,911.20
6. Step 6: Final answer
   x = 11,656.79