Finding the Fourth Proportional to 2,187.61, 3,017.15 and 1,691.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,187.61 : 3,017.15 = 1,691.58 : x
2. Step 2: Convert to fraction form
   2,187.61/3,017.15 = 1,691.58/x
3. Step 3: Cross multiply
   2,187.61x = 3,017.15 × 1,691.58
4. Step 4: Simplify right side
   2,187.61x = 5,103,759.80
5. Step 5: Solve for x
   x = 5,103,759.80/2,187.61
6. Step 6: Final answer
   x = 2,333.03