Finding the Fourth Proportional to 1,631.68, 2,250.72 and 1,165.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,631.68 : 2,250.72 = 1,165.12 : x
2. Step 2: Convert to fraction form
   1,631.68/2,250.72 = 1,165.12/x
3. Step 3: Cross multiply
   1,631.68x = 2,250.72 × 1,165.12
4. Step 4: Simplify right side
   1,631.68x = 2,622,358.89
5. Step 5: Solve for x
   x = 2,622,358.89/1,631.68
6. Step 6: Final answer
   x = 1,607.15