Finding the Fourth Proportional to 1,715.05, 2,570.84 and 675.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,715.05 : 2,570.84 = 675.78 : x
2. Step 2: Convert to fraction form
   1,715.05/2,570.84 = 675.78/x
3. Step 3: Cross multiply
   1,715.05x = 2,570.84 × 675.78
4. Step 4: Simplify right side
   1,715.05x = 1,737,330.37
5. Step 5: Solve for x
   x = 1,737,330.37/1,715.05
6. Step 6: Final answer
   x = 1,012.99