Finding the Fourth Proportional to 1,810.86, 2,716.69 and 578.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,810.86 : 2,716.69 = 578.37 : x
2. Step 2: Convert to fraction form
   1,810.86/2,716.69 = 578.37/x
3. Step 3: Cross multiply
   1,810.86x = 2,716.69 × 578.37
4. Step 4: Simplify right side
   1,810.86x = 1,571,238.90
5. Step 5: Solve for x
   x = 1,571,238.90/1,810.86
6. Step 6: Final answer
   x = 867.68