Finding the Fourth Proportional to 1,985.04, 2,736.72 and 1,320.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,985.04 : 2,736.72 = 1,320.30 : x
2. Step 2: Convert to fraction form
   1,985.04/2,736.72 = 1,320.30/x
3. Step 3: Cross multiply
   1,985.04x = 2,736.72 × 1,320.30
4. Step 4: Simplify right side
   1,985.04x = 3,613,291.42
5. Step 5: Solve for x
   x = 3,613,291.42/1,985.04
6. Step 6: Final answer
   x = 1,820.26