Finding the Fourth Proportional to 2,118.89, 2,923.48 and 1,372.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118.89 : 2,923.48 = 1,372.88 : x
2. Step 2: Convert to fraction form
   2,118.89/2,923.48 = 1,372.88/x
3. Step 3: Cross multiply
   2,118.89x = 2,923.48 × 1,372.88
4. Step 4: Simplify right side
   2,118.89x = 4,013,587.22
5. Step 5: Solve for x
   x = 4,013,587.22/2,118.89
6. Step 6: Final answer
   x = 1,894.19