Finding the Fourth Proportional to 13,147.89, 19,721.46 and 3,787.95

Step by Step Solution

1. Step 1: Write the proportion equation
   13,147.89 : 19,721.46 = 3,787.95 : x
2. Step 2: Convert to fraction form
   13,147.89/19,721.46 = 3,787.95/x
3. Step 3: Cross multiply
   13,147.89x = 19,721.46 × 3,787.95
4. Step 4: Simplify right side
   13,147.89x = 74,703,904.41
5. Step 5: Solve for x
   x = 74,703,904.41/13,147.89
6. Step 6: Final answer
   x = 5,681.82