Finding the Fourth Proportional to 1,679.46, 2,515 and 1,061.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,679.46 : 2,515 = 1,061.30 : x
2. Step 2: Convert to fraction form
   1,679.46/2,515 = 1,061.30/x
3. Step 3: Cross multiply
   1,679.46x = 2,515 × 1,061.30
4. Step 4: Simplify right side
   1,679.46x = 2,669,169.50
5. Step 5: Solve for x
   x = 2,669,169.50/1,679.46
6. Step 6: Final answer
   x = 1,589.30