Finding the Fourth Proportional to 13,142.84, 19,713.78 and 3,908.60

Step by Step Solution

1. Step 1: Write the proportion equation
   13,142.84 : 19,713.78 = 3,908.60 : x
2. Step 2: Convert to fraction form
   13,142.84/19,713.78 = 3,908.60/x
3. Step 3: Cross multiply
   13,142.84x = 19,713.78 × 3,908.60
4. Step 4: Simplify right side
   13,142.84x = 77,053,280.51
5. Step 5: Solve for x
   x = 77,053,280.51/13,142.84
6. Step 6: Final answer
   x = 5,862.76