Finding the Fourth Proportional to 1,737.30, 2,605.61 and 812.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,737.30 : 2,605.61 = 812.61 : x
2. Step 2: Convert to fraction form
   1,737.30/2,605.61 = 812.61/x
3. Step 3: Cross multiply
   1,737.30x = 2,605.61 × 812.61
4. Step 4: Simplify right side
   1,737.30x = 2,117,333.73
5. Step 5: Solve for x
   x = 2,117,333.73/1,737.30
6. Step 6: Final answer
   x = 1,218.75