Finding the Fourth Proportional to 1,341.31, 1,851.68 and 921.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,341.31 : 1,851.68 = 921.82 : x
2. Step 2: Convert to fraction form
   1,341.31/1,851.68 = 921.82/x
3. Step 3: Cross multiply
   1,341.31x = 1,851.68 × 921.82
4. Step 4: Simplify right side
   1,341.31x = 1,706,911.05
5. Step 5: Solve for x
   x = 1,706,911.05/1,341.31
6. Step 6: Final answer
   x = 1,272.57