Finding the Fourth Proportional to 1,813.86, 2,504.16 and 1,315.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,813.86 : 2,504.16 = 1,315.98 : x
2. Step 2: Convert to fraction form
   1,813.86/2,504.16 = 1,315.98/x
3. Step 3: Cross multiply
   1,813.86x = 2,504.16 × 1,315.98
4. Step 4: Simplify right side
   1,813.86x = 3,295,424.48
5. Step 5: Solve for x
   x = 3,295,424.48/1,813.86
6. Step 6: Final answer
   x = 1,816.80