Finding the Fourth Proportional to 2,145.32, 2,961.41 and 1,815.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,145.32 : 2,961.41 = 1,815.46 : x
2. Step 2: Convert to fraction form
   2,145.32/2,961.41 = 1,815.46/x
3. Step 3: Cross multiply
   2,145.32x = 2,961.41 × 1,815.46
4. Step 4: Simplify right side
   2,145.32x = 5,376,321.40
5. Step 5: Solve for x
   x = 5,376,321.40/2,145.32
6. Step 6: Final answer
   x = 2,506.07