Finding the Fourth Proportional to 1,081.58, 1,624.31 and 994.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.58 : 1,624.31 = 994.75 : x
2. Step 2: Convert to fraction form
   1,081.58/1,624.31 = 994.75/x
3. Step 3: Cross multiply
   1,081.58x = 1,624.31 × 994.75
4. Step 4: Simplify right side
   1,081.58x = 1,615,783.16
5. Step 5: Solve for x
   x = 1,615,783.16/1,081.58
6. Step 6: Final answer
   x = 1,493.92