Finding the Fourth Proportional to 10,500.84, 15,751.20 and 3,105.36

Step by Step Solution

1. Step 1: Write the proportion equation
   10,500.84 : 15,751.20 = 3,105.36 : x
2. Step 2: Convert to fraction form
   10,500.84/15,751.20 = 3,105.36/x
3. Step 3: Cross multiply
   10,500.84x = 15,751.20 × 3,105.36
4. Step 4: Simplify right side
   10,500.84x = 48,913,146.43
5. Step 5: Solve for x
   x = 48,913,146.43/10,500.84
6. Step 6: Final answer
   x = 4,658.02