Finding the Fourth Proportional to 1,709.84, 2,563.68 and 1,478.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,709.84 : 2,563.68 = 1,478.72 : x
2. Step 2: Convert to fraction form
   1,709.84/2,563.68 = 1,478.72/x
3. Step 3: Cross multiply
   1,709.84x = 2,563.68 × 1,478.72
4. Step 4: Simplify right side
   1,709.84x = 3,790,964.89
5. Step 5: Solve for x
   x = 3,790,964.89/1,709.84
6. Step 6: Final answer
   x = 2,217.15