Finding the Fourth Proportional to 1,920.45, 2,649.42 and 1,174.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,920.45 : 2,649.42 = 1,174.17 : x
2. Step 2: Convert to fraction form
   1,920.45/2,649.42 = 1,174.17/x
3. Step 3: Cross multiply
   1,920.45x = 2,649.42 × 1,174.17
4. Step 4: Simplify right side
   1,920.45x = 3,110,870.23
5. Step 5: Solve for x
   x = 3,110,870.23/1,920.45
6. Step 6: Final answer
   x = 1,619.86