Finding the Fourth Proportional to 13,185.05, 19,775.05 and 3,951.05

Step by Step Solution

1. Step 1: Write the proportion equation
   13,185.05 : 19,775.05 = 3,951.05 : x
2. Step 2: Convert to fraction form
   13,185.05/19,775.05 = 3,951.05/x
3. Step 3: Cross multiply
   13,185.05x = 19,775.05 × 3,951.05
4. Step 4: Simplify right side
   13,185.05x = 78,132,102.55
5. Step 5: Solve for x
   x = 78,132,102.55/13,185.05
6. Step 6: Final answer
   x = 5,925.81