Finding the Fourth Proportional to 2,106.69, 3,156.54 and 1,282.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,106.69 : 3,156.54 = 1,282.47 : x
2. Step 2: Convert to fraction form
   2,106.69/3,156.54 = 1,282.47/x
3. Step 3: Cross multiply
   2,106.69x = 3,156.54 × 1,282.47
4. Step 4: Simplify right side
   2,106.69x = 4,048,167.85
5. Step 5: Solve for x
   x = 4,048,167.85/2,106.69
6. Step 6: Final answer
   x = 1,921.58