Finding the Fourth Proportional to 2,155.32, 2,974.68 and 1,369.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.32 : 2,974.68 = 1,369.62 : x
2. Step 2: Convert to fraction form
   2,155.32/2,974.68 = 1,369.62/x
3. Step 3: Cross multiply
   2,155.32x = 2,974.68 × 1,369.62
4. Step 4: Simplify right side
   2,155.32x = 4,074,181.22
5. Step 5: Solve for x
   x = 4,074,181.22/2,155.32
6. Step 6: Final answer
   x = 1,890.29