Finding the Fourth Proportional to 2,145.09, 3,215.40 and 1,050.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,145.09 : 3,215.40 = 1,050.18 : x
2. Step 2: Convert to fraction form
   2,145.09/3,215.40 = 1,050.18/x
3. Step 3: Cross multiply
   2,145.09x = 3,215.40 × 1,050.18
4. Step 4: Simplify right side
   2,145.09x = 3,376,748.77
5. Step 5: Solve for x
   x = 3,376,748.77/2,145.09
6. Step 6: Final answer
   x = 1,574.18