Finding the Fourth Proportional to 1,850.40, 2,553.81 and 1,064.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,850.40 : 2,553.81 = 1,064.31 : x
2. Step 2: Convert to fraction form
   1,850.40/2,553.81 = 1,064.31/x
3. Step 3: Cross multiply
   1,850.40x = 2,553.81 × 1,064.31
4. Step 4: Simplify right side
   1,850.40x = 2,718,045.52
5. Step 5: Solve for x
   x = 2,718,045.52/1,850.40
6. Step 6: Final answer
   x = 1,468.90