Finding the Fourth Proportional to 13,277.75, 19,911.98 and 3,915.29

Step by Step Solution

1. Step 1: Write the proportion equation
   13,277.75 : 19,911.98 = 3,915.29 : x
2. Step 2: Convert to fraction form
   13,277.75/19,911.98 = 3,915.29/x
3. Step 3: Cross multiply
   13,277.75x = 19,911.98 × 3,915.29
4. Step 4: Simplify right side
   13,277.75x = 77,961,086.40
5. Step 5: Solve for x
   x = 77,961,086.40/13,277.75
6. Step 6: Final answer
   x = 5,871.56