Finding the Fourth Proportional to 1,340.82, 1,851.17 and 921.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,340.82 : 1,851.17 = 921.02 : x
2. Step 2: Convert to fraction form
   1,340.82/1,851.17 = 921.02/x
3. Step 3: Cross multiply
   1,340.82x = 1,851.17 × 921.02
4. Step 4: Simplify right side
   1,340.82x = 1,704,950.73
5. Step 5: Solve for x
   x = 1,704,950.73/1,340.82
6. Step 6: Final answer
   x = 1,271.57