Finding the Fourth Proportional to 2,106.24, 3,151.80 and 1,284.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,106.24 : 3,151.80 = 1,284.72 : x
2. Step 2: Convert to fraction form
   2,106.24/3,151.80 = 1,284.72/x
3. Step 3: Cross multiply
   2,106.24x = 3,151.80 × 1,284.72
4. Step 4: Simplify right side
   2,106.24x = 4,049,180.50
5. Step 5: Solve for x
   x = 4,049,180.50/2,106.24
6. Step 6: Final answer
   x = 1,922.47