Finding the Fourth Proportional to 13,196.55, 19,777.90 and 5,396.07

Step by Step Solution

1. Step 1: Write the proportion equation
   13,196.55 : 19,777.90 = 5,396.07 : x
2. Step 2: Convert to fraction form
   13,196.55/19,777.90 = 5,396.07/x
3. Step 3: Cross multiply
   13,196.55x = 19,777.90 × 5,396.07
4. Step 4: Simplify right side
   13,196.55x = 106,722,932.85
5. Step 5: Solve for x
   x = 106,722,932.85/13,196.55
6. Step 6: Final answer
   x = 8,087.18