Finding the Fourth Proportional to 1,815.86, 2,506.92 and 1,317.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,815.86 : 2,506.92 = 1,317.98 : x
2. Step 2: Convert to fraction form
   1,815.86/2,506.92 = 1,317.98/x
3. Step 3: Cross multiply
   1,815.86x = 2,506.92 × 1,317.98
4. Step 4: Simplify right side
   1,815.86x = 3,304,070.42
5. Step 5: Solve for x
   x = 3,304,070.42/1,815.86
6. Step 6: Final answer
   x = 1,819.56