Finding the Fourth Proportional to 1,657.91, 2,287.97 and 994.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,657.91 : 2,287.97 = 994.63 : x
2. Step 2: Convert to fraction form
   1,657.91/2,287.97 = 994.63/x
3. Step 3: Cross multiply
   1,657.91x = 2,287.97 × 994.63
4. Step 4: Simplify right side
   1,657.91x = 2,275,683.60
5. Step 5: Solve for x
   x = 2,275,683.60/1,657.91
6. Step 6: Final answer
   x = 1,372.63