Finding the Fourth Proportional to 1,920.60, 2,649.78 and 1,174.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,920.60 : 2,649.78 = 1,174.14 : x
2. Step 2: Convert to fraction form
   1,920.60/2,649.78 = 1,174.14/x
3. Step 3: Cross multiply
   1,920.60x = 2,649.78 × 1,174.14
4. Step 4: Simplify right side
   1,920.60x = 3,111,212.69
5. Step 5: Solve for x
   x = 3,111,212.69/1,920.60
6. Step 6: Final answer
   x = 1,619.92