Finding the Fourth Proportional to 2,158.32, 2,978.82 and 1,372.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158.32 : 2,978.82 = 1,372.62 : x
2. Step 2: Convert to fraction form
   2,158.32/2,978.82 = 1,372.62/x
3. Step 3: Cross multiply
   2,158.32x = 2,978.82 × 1,372.62
4. Step 4: Simplify right side
   2,158.32x = 4,088,787.91
5. Step 5: Solve for x
   x = 4,088,787.91/2,158.32
6. Step 6: Final answer
   x = 1,894.43