Finding the Fourth Proportional to 1,357.74, 1,873.50 and 798.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,357.74 : 1,873.50 = 798.30 : x
2. Step 2: Convert to fraction form
   1,357.74/1,873.50 = 798.30/x
3. Step 3: Cross multiply
   1,357.74x = 1,873.50 × 798.30
4. Step 4: Simplify right side
   1,357.74x = 1,495,615.05
5. Step 5: Solve for x
   x = 1,495,615.05/1,357.74
6. Step 6: Final answer
   x = 1,101.55