Finding the Fourth Proportional to 1,646.34, 2,271.78 and 983.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,646.34 : 2,271.78 = 983.10 : x
2. Step 2: Convert to fraction form
   1,646.34/2,271.78 = 983.10/x
3. Step 3: Cross multiply
   1,646.34x = 2,271.78 × 983.10
4. Step 4: Simplify right side
   1,646.34x = 2,233,386.92
5. Step 5: Solve for x
   x = 2,233,386.92/1,646.34
6. Step 6: Final answer
   x = 1,356.58