Finding the Fourth Proportional to 2,158.98, 2,979.89 and 1,372.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158.98 : 2,979.89 = 1,372.87 : x
2. Step 2: Convert to fraction form
   2,158.98/2,979.89 = 1,372.87/x
3. Step 3: Cross multiply
   2,158.98x = 2,979.89 × 1,372.87
4. Step 4: Simplify right side
   2,158.98x = 4,091,001.58
5. Step 5: Solve for x
   x = 4,091,001.58/2,158.98
6. Step 6: Final answer
   x = 1,894.88