Finding the Fourth Proportional to 1,707.27, 2,561.18 and 611.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,707.27 : 2,561.18 = 611.61 : x
2. Step 2: Convert to fraction form
   1,707.27/2,561.18 = 611.61/x
3. Step 3: Cross multiply
   1,707.27x = 2,561.18 × 611.61
4. Step 4: Simplify right side
   1,707.27x = 1,566,448.17
5. Step 5: Solve for x
   x = 1,566,448.17/1,707.27
6. Step 6: Final answer
   x = 917.52