Finding the Fourth Proportional to 12,955.91, 17,879.72 and 7,650.74

Step by Step Solution

1. Step 1: Write the proportion equation
   12,955.91 : 17,879.72 = 7,650.74 : x
2. Step 2: Convert to fraction form
   12,955.91/17,879.72 = 7,650.74/x
3. Step 3: Cross multiply
   12,955.91x = 17,879.72 × 7,650.74
4. Step 4: Simplify right side
   12,955.91x = 136,792,961.34
5. Step 5: Solve for x
   x = 136,792,961.34/12,955.91
6. Step 6: Final answer
   x = 10,558.35