Finding the Fourth Proportional to 2,072.38, 2,859.90 and 1,140.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,072.38 : 2,859.90 = 1,140.88 : x
2. Step 2: Convert to fraction form
   2,072.38/2,859.90 = 1,140.88/x
3. Step 3: Cross multiply
   2,072.38x = 2,859.90 × 1,140.88
4. Step 4: Simplify right side
   2,072.38x = 3,262,802.71
5. Step 5: Solve for x
   x = 3,262,802.71/2,072.38
6. Step 6: Final answer
   x = 1,574.42