Finding the Fourth Proportional to 1,528.84, 2,105.85 and 1,426.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,528.84 : 2,105.85 = 1,426.78 : x
2. Step 2: Convert to fraction form
   1,528.84/2,105.85 = 1,426.78/x
3. Step 3: Cross multiply
   1,528.84x = 2,105.85 × 1,426.78
4. Step 4: Simplify right side
   1,528.84x = 3,004,592.65
5. Step 5: Solve for x
   x = 3,004,592.65/1,528.84
6. Step 6: Final answer
   x = 1,965.27