Finding the Fourth Proportional to 1,687.82, 2,530.05 and 1,173.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,687.82 : 2,530.05 = 1,173.74 : x
2. Step 2: Convert to fraction form
   1,687.82/2,530.05 = 1,173.74/x
3. Step 3: Cross multiply
   1,687.82x = 2,530.05 × 1,173.74
4. Step 4: Simplify right side
   1,687.82x = 2,969,620.89
5. Step 5: Solve for x
   x = 2,969,620.89/1,687.82
6. Step 6: Final answer
   x = 1,759.44