Finding the Fourth Proportional to 12,776.37, 19,166.88 and 5,279.95

Step by Step Solution

1. Step 1: Write the proportion equation
   12,776.37 : 19,166.88 = 5,279.95 : x
2. Step 2: Convert to fraction form
   12,776.37/19,166.88 = 5,279.95/x
3. Step 3: Cross multiply
   12,776.37x = 19,166.88 × 5,279.95
4. Step 4: Simplify right side
   12,776.37x = 101,200,168.06
5. Step 5: Solve for x
   x = 101,200,168.06/12,776.37
6. Step 6: Final answer
   x = 7,920.89