Finding the Fourth Proportional to 1,090.94, 1,636.42 and 897.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,090.94 : 1,636.42 = 897.98 : x
2. Step 2: Convert to fraction form
   1,090.94/1,636.42 = 897.98/x
3. Step 3: Cross multiply
   1,090.94x = 1,636.42 × 897.98
4. Step 4: Simplify right side
   1,090.94x = 1,469,472.43
5. Step 5: Solve for x
   x = 1,469,472.43/1,090.94
6. Step 6: Final answer
   x = 1,346.98