Finding the Fourth Proportional to 2,118.24, 2,921.40 and 1,894.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118.24 : 2,921.40 = 1,894.50 : x
2. Step 2: Convert to fraction form
   2,118.24/2,921.40 = 1,894.50/x
3. Step 3: Cross multiply
   2,118.24x = 2,921.40 × 1,894.50
4. Step 4: Simplify right side
   2,118.24x = 5,534,592.30
5. Step 5: Solve for x
   x = 5,534,592.30/2,118.24
6. Step 6: Final answer
   x = 2,612.83