Finding the Fourth Proportional to 1,985.08, 2,739.53 and 1,145.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,985.08 : 2,739.53 = 1,145.89 : x
2. Step 2: Convert to fraction form
   1,985.08/2,739.53 = 1,145.89/x
3. Step 3: Cross multiply
   1,985.08x = 2,739.53 × 1,145.89
4. Step 4: Simplify right side
   1,985.08x = 3,139,200.03
5. Step 5: Solve for x
   x = 3,139,200.03/1,985.08
6. Step 6: Final answer
   x = 1,581.40