Finding the Fourth Proportional to 1,981.36, 2,732.88 and 1,317.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,981.36 : 2,732.88 = 1,317.88 : x
2. Step 2: Convert to fraction form
   1,981.36/2,732.88 = 1,317.88/x
3. Step 3: Cross multiply
   1,981.36x = 2,732.88 × 1,317.88
4. Step 4: Simplify right side
   1,981.36x = 3,601,607.89
5. Step 5: Solve for x
   x = 3,601,607.89/1,981.36
6. Step 6: Final answer
   x = 1,817.75