Finding the Fourth Proportional to 1,708.83, 2,561.31 and 1,187.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,708.83 : 2,561.31 = 1,187.55 : x
2. Step 2: Convert to fraction form
   1,708.83/2,561.31 = 1,187.55/x
3. Step 3: Cross multiply
   1,708.83x = 2,561.31 × 1,187.55
4. Step 4: Simplify right side
   1,708.83x = 3,041,683.69
5. Step 5: Solve for x
   x = 3,041,683.69/1,708.83
6. Step 6: Final answer
   x = 1,779.98