Finding the Fourth Proportional to 1,985.25, 2,739.40 and 1,145.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,985.25 : 2,739.40 = 1,145.94 : x
2. Step 2: Convert to fraction form
   1,985.25/2,739.40 = 1,145.94/x
3. Step 3: Cross multiply
   1,985.25x = 2,739.40 × 1,145.94
4. Step 4: Simplify right side
   1,985.25x = 3,139,188.04
5. Step 5: Solve for x
   x = 3,139,188.04/1,985.25
6. Step 6: Final answer
   x = 1,581.26