Finding the Fourth Proportional to 1,851.71, 2,774.52 and 1,121.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,851.71 : 2,774.52 = 1,121.49 : x
2. Step 2: Convert to fraction form
   1,851.71/2,774.52 = 1,121.49/x
3. Step 3: Cross multiply
   1,851.71x = 2,774.52 × 1,121.49
4. Step 4: Simplify right side
   1,851.71x = 3,111,596.43
5. Step 5: Solve for x
   x = 3,111,596.43/1,851.71
6. Step 6: Final answer
   x = 1,680.40