Finding the Fourth Proportional to 2,573.50, 3,857.60 and 1,012.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,573.50 : 3,857.60 = 1,012.87 : x
2. Step 2: Convert to fraction form
   2,573.50/3,857.60 = 1,012.87/x
3. Step 3: Cross multiply
   2,573.50x = 3,857.60 × 1,012.87
4. Step 4: Simplify right side
   2,573.50x = 3,907,232.60
5. Step 5: Solve for x
   x = 3,907,232.60/2,573.50
6. Step 6: Final answer
   x = 1,518.26