Finding the Fourth Proportional to 2,108.76, 2,908.80 and 1,322.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,108.76 : 2,908.80 = 1,322.70 : x
2. Step 2: Convert to fraction form
   2,108.76/2,908.80 = 1,322.70/x
3. Step 3: Cross multiply
   2,108.76x = 2,908.80 × 1,322.70
4. Step 4: Simplify right side
   2,108.76x = 3,847,469.76
5. Step 5: Solve for x
   x = 3,847,469.76/2,108.76
6. Step 6: Final answer
   x = 1,824.52