Finding the Fourth Proportional to 2,539.31, 3,809.71 and 1,153.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,539.31 : 3,809.71 = 1,153.76 : x
2. Step 2: Convert to fraction form
   2,539.31/3,809.71 = 1,153.76/x
3. Step 3: Cross multiply
   2,539.31x = 3,809.71 × 1,153.76
4. Step 4: Simplify right side
   2,539.31x = 4,395,475.52
5. Step 5: Solve for x
   x = 4,395,475.52/2,539.31
6. Step 6: Final answer
   x = 1,730.97