Finding the Fourth Proportional to 1,665.38, 2,498.34 and 799.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.38 : 2,498.34 = 799.58 : x
2. Step 2: Convert to fraction form
   1,665.38/2,498.34 = 799.58/x
3. Step 3: Cross multiply
   1,665.38x = 2,498.34 × 799.58
4. Step 4: Simplify right side
   1,665.38x = 1,997,622.70
5. Step 5: Solve for x
   x = 1,997,622.70/1,665.38
6. Step 6: Final answer
   x = 1,199.50