Finding the Fourth Proportional to 12,708.42, 19,063.86 and 3,940.98

Step by Step Solution

1. Step 1: Write the proportion equation
   12,708.42 : 19,063.86 = 3,940.98 : x
2. Step 2: Convert to fraction form
   12,708.42/19,063.86 = 3,940.98/x
3. Step 3: Cross multiply
   12,708.42x = 19,063.86 × 3,940.98
4. Step 4: Simplify right side
   12,708.42x = 75,130,290.98
5. Step 5: Solve for x
   x = 75,130,290.98/12,708.42
6. Step 6: Final answer
   x = 5,911.85