Finding the Fourth Proportional to 1,146.86, 1,581.72 and 997.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,146.86 : 1,581.72 = 997.24 : x
2. Step 2: Convert to fraction form
   1,146.86/1,581.72 = 997.24/x
3. Step 3: Cross multiply
   1,146.86x = 1,581.72 × 997.24
4. Step 4: Simplify right side
   1,146.86x = 1,577,354.45
5. Step 5: Solve for x
   x = 1,577,354.45/1,146.86
6. Step 6: Final answer
   x = 1,375.37