Finding the Fourth Proportional to 1,985.40, 2,739.81 and 1,146.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,985.40 : 2,739.81 = 1,146.10 : x
2. Step 2: Convert to fraction form
   1,985.40/2,739.81 = 1,146.10/x
3. Step 3: Cross multiply
   1,985.40x = 2,739.81 × 1,146.10
4. Step 4: Simplify right side
   1,985.40x = 3,140,096.24
5. Step 5: Solve for x
   x = 3,140,096.24/1,985.40
6. Step 6: Final answer
   x = 1,581.59