Finding the Fourth Proportional to 1,920.06, 2,649.60 and 1,175.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,920.06 : 2,649.60 = 1,175.28 : x
2. Step 2: Convert to fraction form
   1,920.06/2,649.60 = 1,175.28/x
3. Step 3: Cross multiply
   1,920.06x = 2,649.60 × 1,175.28
4. Step 4: Simplify right side
   1,920.06x = 3,114,021.89
5. Step 5: Solve for x
   x = 3,114,021.89/1,920.06
6. Step 6: Final answer
   x = 1,621.84