Finding the Fourth Proportional to 12,050.69, 18,059.63 and 7,660.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,050.69 : 18,059.63 = 7,660.28 : x
2. Step 2: Convert to fraction form
   12,050.69/18,059.63 = 7,660.28/x
3. Step 3: Cross multiply
   12,050.69x = 18,059.63 × 7,660.28
4. Step 4: Simplify right side
   12,050.69x = 138,341,822.50
5. Step 5: Solve for x
   x = 138,341,822.50/12,050.69
6. Step 6: Final answer
   x = 11,479.99