Finding the Fourth Proportional to 2,173.19, 2,987.89 and 1,934.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,173.19 : 2,987.89 = 1,934.87 : x
2. Step 2: Convert to fraction form
   2,173.19/2,987.89 = 1,934.87/x
3. Step 3: Cross multiply
   2,173.19x = 2,987.89 × 1,934.87
4. Step 4: Simplify right side
   2,173.19x = 5,781,178.72
5. Step 5: Solve for x
   x = 5,781,178.72/2,173.19
6. Step 6: Final answer
   x = 2,660.23