Finding the Fourth Proportional to 12,776.76, 19,166.67 and 3,417.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,776.76 : 19,166.67 = 3,417.12 : x
2. Step 2: Convert to fraction form
   12,776.76/19,166.67 = 3,417.12/x
3. Step 3: Cross multiply
   12,776.76x = 19,166.67 × 3,417.12
4. Step 4: Simplify right side
   12,776.76x = 65,494,811.39
5. Step 5: Solve for x
   x = 65,494,811.39/12,776.76
6. Step 6: Final answer
   x = 5,126.09