Finding the Fourth Proportional to 1,243.49, 1,715.82 and 801.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,243.49 : 1,715.82 = 801.98 : x
2. Step 2: Convert to fraction form
   1,243.49/1,715.82 = 801.98/x
3. Step 3: Cross multiply
   1,243.49x = 1,715.82 × 801.98
4. Step 4: Simplify right side
   1,243.49x = 1,376,057.82
5. Step 5: Solve for x
   x = 1,376,057.82/1,243.49
6. Step 6: Final answer
   x = 1,106.61