Finding the Fourth Proportional to 2,072.07, 2,859.45 and 1,140.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,072.07 : 2,859.45 = 1,140.57 : x
2. Step 2: Convert to fraction form
   2,072.07/2,859.45 = 1,140.57/x
3. Step 3: Cross multiply
   2,072.07x = 2,859.45 × 1,140.57
4. Step 4: Simplify right side
   2,072.07x = 3,261,402.89
5. Step 5: Solve for x
   x = 3,261,402.89/2,072.07
6. Step 6: Final answer
   x = 1,573.98