Finding the Fourth Proportional to 1,891.32, 2,609.82 and 1,145.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,891.32 : 2,609.82 = 1,145.22 : x
2. Step 2: Convert to fraction form
   1,891.32/2,609.82 = 1,145.22/x
3. Step 3: Cross multiply
   1,891.32x = 2,609.82 × 1,145.22
4. Step 4: Simplify right side
   1,891.32x = 2,988,818.06
5. Step 5: Solve for x
   x = 2,988,818.06/1,891.32
6. Step 6: Final answer
   x = 1,580.28