Finding the Fourth Proportional to 1,391.04, 1,914.72 and 997.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,391.04 : 1,914.72 = 997.44 : x
2. Step 2: Convert to fraction form
   1,391.04/1,914.72 = 997.44/x
3. Step 3: Cross multiply
   1,391.04x = 1,914.72 × 997.44
4. Step 4: Simplify right side
   1,391.04x = 1,909,818.32
5. Step 5: Solve for x
   x = 1,909,818.32/1,391.04
6. Step 6: Final answer
   x = 1,372.94