Finding the Fourth Proportional to 1,738.67, 2,605.56 and 812.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,738.67 : 2,605.56 = 812.03 : x
2. Step 2: Convert to fraction form
   1,738.67/2,605.56 = 812.03/x
3. Step 3: Cross multiply
   1,738.67x = 2,605.56 × 812.03
4. Step 4: Simplify right side
   1,738.67x = 2,115,779.86
5. Step 5: Solve for x
   x = 2,115,779.86/1,738.67
6. Step 6: Final answer
   x = 1,216.90