Finding the Fourth Proportional to 1,728.74, 2,386.16 and 983.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,728.74 : 2,386.16 = 983.10 : x
2. Step 2: Convert to fraction form
   1,728.74/2,386.16 = 983.10/x
3. Step 3: Cross multiply
   1,728.74x = 2,386.16 × 983.10
4. Step 4: Simplify right side
   1,728.74x = 2,345,841.62
5. Step 5: Solve for x
   x = 2,345,841.62/1,728.74
6. Step 6: Final answer
   x = 1,356.96