Finding the Fourth Proportional to 1,357.30, 2,036.52 and 871.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,357.30 : 2,036.52 = 871.30 : x
2. Step 2: Convert to fraction form
   1,357.30/2,036.52 = 871.30/x
3. Step 3: Cross multiply
   1,357.30x = 2,036.52 × 871.30
4. Step 4: Simplify right side
   1,357.30x = 1,774,419.88
5. Step 5: Solve for x
   x = 1,774,419.88/1,357.30
6. Step 6: Final answer
   x = 1,307.32