Finding the Fourth Proportional to 2,187.86, 3,020.67 and 1,689.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,187.86 : 3,020.67 = 1,689.62 : x
2. Step 2: Convert to fraction form
   2,187.86/3,020.67 = 1,689.62/x
3. Step 3: Cross multiply
   2,187.86x = 3,020.67 × 1,689.62
4. Step 4: Simplify right side
   2,187.86x = 5,103,784.45
5. Step 5: Solve for x
   x = 5,103,784.45/2,187.86
6. Step 6: Final answer
   x = 2,332.77