Finding the Fourth Proportional to 1,342.24, 1,853.34 and 870.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,342.24 : 1,853.34 = 870.36 : x
2. Step 2: Convert to fraction form
   1,342.24/1,853.34 = 870.36/x
3. Step 3: Cross multiply
   1,342.24x = 1,853.34 × 870.36
4. Step 4: Simplify right side
   1,342.24x = 1,613,073.00
5. Step 5: Solve for x
   x = 1,613,073.00/1,342.24
6. Step 6: Final answer
   x = 1,201.78