Finding the Fourth Proportional to 1,985.03, 2,739.33 and 1,145.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,985.03 : 2,739.33 = 1,145.72 : x
2. Step 2: Convert to fraction form
   1,985.03/2,739.33 = 1,145.72/x
3. Step 3: Cross multiply
   1,985.03x = 2,739.33 × 1,145.72
4. Step 4: Simplify right side
   1,985.03x = 3,138,505.17
5. Step 5: Solve for x
   x = 3,138,505.17/1,985.03
6. Step 6: Final answer
   x = 1,581.09