Finding the Fourth Proportional to 1,057.60, 1,584.67 and 1,017.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,057.60 : 1,584.67 = 1,017.10 : x
2. Step 2: Convert to fraction form
   1,057.60/1,584.67 = 1,017.10/x
3. Step 3: Cross multiply
   1,057.60x = 1,584.67 × 1,017.10
4. Step 4: Simplify right side
   1,057.60x = 1,611,767.86
5. Step 5: Solve for x
   x = 1,611,767.86/1,057.60
6. Step 6: Final answer
   x = 1,523.99