Finding the Fourth Proportional to 1,707.57, 2,561.04 and 783.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,707.57 : 2,561.04 = 783.18 : x
2. Step 2: Convert to fraction form
   1,707.57/2,561.04 = 783.18/x
3. Step 3: Cross multiply
   1,707.57x = 2,561.04 × 783.18
4. Step 4: Simplify right side
   1,707.57x = 2,005,755.31
5. Step 5: Solve for x
   x = 2,005,755.31/1,707.57
6. Step 6: Final answer
   x = 1,174.63