Finding the Fourth Proportional to 2,538.67, 3,805.48 and 1,440.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,538.67 : 3,805.48 = 1,440.76 : x
2. Step 2: Convert to fraction form
   2,538.67/3,805.48 = 1,440.76/x
3. Step 3: Cross multiply
   2,538.67x = 3,805.48 × 1,440.76
4. Step 4: Simplify right side
   2,538.67x = 5,482,783.36
5. Step 5: Solve for x
   x = 5,482,783.36/2,538.67
6. Step 6: Final answer
   x = 2,159.71