Finding the Fourth Proportional to 1,371.31, 2,054.34 and 1,153.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,371.31 : 2,054.34 = 1,153.31 : x
2. Step 2: Convert to fraction form
   1,371.31/2,054.34 = 1,153.31/x
3. Step 3: Cross multiply
   1,371.31x = 2,054.34 × 1,153.31
4. Step 4: Simplify right side
   1,371.31x = 2,369,280.59
5. Step 5: Solve for x
   x = 2,369,280.59/1,371.31
6. Step 6: Final answer
   x = 1,727.75