Finding the Fourth Proportional to 2,945.63, 4,418.86 and 997.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,945.63 : 4,418.86 = 997.31 : x
2. Step 2: Convert to fraction form
   2,945.63/4,418.86 = 997.31/x
3. Step 3: Cross multiply
   2,945.63x = 4,418.86 × 997.31
4. Step 4: Simplify right side
   2,945.63x = 4,406,973.27
5. Step 5: Solve for x
   x = 4,406,973.27/2,945.63
6. Step 6: Final answer
   x = 1,496.11