Finding the Fourth Proportional to 1,680.51, 2,318.31 and 1,090.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,680.51 : 2,318.31 = 1,090.83 : x
2. Step 2: Convert to fraction form
   1,680.51/2,318.31 = 1,090.83/x
3. Step 3: Cross multiply
   1,680.51x = 2,318.31 × 1,090.83
4. Step 4: Simplify right side
   1,680.51x = 2,528,882.10
5. Step 5: Solve for x
   x = 2,528,882.10/1,680.51
6. Step 6: Final answer
   x = 1,504.83