Finding the Fourth Proportional to 1,645.20, 2,464.56 and 994.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,645.20 : 2,464.56 = 994.32 : x
2. Step 2: Convert to fraction form
   1,645.20/2,464.56 = 994.32/x
3. Step 3: Cross multiply
   1,645.20x = 2,464.56 × 994.32
4. Step 4: Simplify right side
   1,645.20x = 2,450,561.30
5. Step 5: Solve for x
   x = 2,450,561.30/1,645.20
6. Step 6: Final answer
   x = 1,489.52