Finding the Fourth Proportional to 1,685.24, 2,326.56 and 1,291.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,685.24 : 2,326.56 = 1,291.04 : x
2. Step 2: Convert to fraction form
   1,685.24/2,326.56 = 1,291.04/x
3. Step 3: Cross multiply
   1,685.24x = 2,326.56 × 1,291.04
4. Step 4: Simplify right side
   1,685.24x = 3,003,682.02
5. Step 5: Solve for x
   x = 3,003,682.02/1,685.24
6. Step 6: Final answer
   x = 1,782.35