Finding the Fourth Proportional to 3,145.54, 4,715.88 and 2,105.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,145.54 : 4,715.88 = 2,105.50 : x
2. Step 2: Convert to fraction form
   3,145.54/4,715.88 = 2,105.50/x
3. Step 3: Cross multiply
   3,145.54x = 4,715.88 × 2,105.50
4. Step 4: Simplify right side
   3,145.54x = 9,929,285.34
5. Step 5: Solve for x
   x = 9,929,285.34/3,145.54
6. Step 6: Final answer
   x = 3,156.62