Finding the Fourth Proportional to 1,920.82, 2,650.80 and 1,175.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,920.82 : 2,650.80 = 1,175.12 : x
2. Step 2: Convert to fraction form
   1,920.82/2,650.80 = 1,175.12/x
3. Step 3: Cross multiply
   1,920.82x = 2,650.80 × 1,175.12
4. Step 4: Simplify right side
   1,920.82x = 3,115,008.10
5. Step 5: Solve for x
   x = 3,115,008.10/1,920.82
6. Step 6: Final answer
   x = 1,621.71