Finding the Fourth Proportional to 1,081.32, 1,623.94 and 994.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.32 : 1,623.94 = 994.50 : x
2. Step 2: Convert to fraction form
   1,081.32/1,623.94 = 994.50/x
3. Step 3: Cross multiply
   1,081.32x = 1,623.94 × 994.50
4. Step 4: Simplify right side
   1,081.32x = 1,614,995.24
5. Step 5: Solve for x
   x = 1,614,995.24/1,081.32
6. Step 6: Final answer
   x = 1,493.54