Finding the Fourth Proportional to 2,155.89, 3,230.80 and 983.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.89 : 3,230.80 = 983.01 : x
2. Step 2: Convert to fraction form
   2,155.89/3,230.80 = 983.01/x
3. Step 3: Cross multiply
   2,155.89x = 3,230.80 × 983.01
4. Step 4: Simplify right side
   2,155.89x = 3,175,906.25
5. Step 5: Solve for x
   x = 3,175,906.25/2,155.89
6. Step 6: Final answer
   x = 1,473.13