Finding the Fourth Proportional to 2,223.98, 3,333.08 and 991.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,223.98 : 3,333.08 = 991.34 : x
2. Step 2: Convert to fraction form
   2,223.98/3,333.08 = 991.34/x
3. Step 3: Cross multiply
   2,223.98x = 3,333.08 × 991.34
4. Step 4: Simplify right side
   2,223.98x = 3,304,193.91
5. Step 5: Solve for x
   x = 3,304,193.91/2,223.98
6. Step 6: Final answer
   x = 1,485.72