Finding the Fourth Proportional to 1,196.74, 1,782.75 and 1,121.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,196.74 : 1,782.75 = 1,121.05 : x
2. Step 2: Convert to fraction form
   1,196.74/1,782.75 = 1,121.05/x
3. Step 3: Cross multiply
   1,196.74x = 1,782.75 × 1,121.05
4. Step 4: Simplify right side
   1,196.74x = 1,998,551.89
5. Step 5: Solve for x
   x = 1,998,551.89/1,196.74
6. Step 6: Final answer
   x = 1,670.00