Finding the Fourth Proportional to 1,810.78, 2,497.50 and 1,315.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,810.78 : 2,497.50 = 1,315.06 : x
2. Step 2: Convert to fraction form
   1,810.78/2,497.50 = 1,315.06/x
3. Step 3: Cross multiply
   1,810.78x = 2,497.50 × 1,315.06
4. Step 4: Simplify right side
   1,810.78x = 3,284,362.35
5. Step 5: Solve for x
   x = 3,284,362.35/1,810.78
6. Step 6: Final answer
   x = 1,813.78