Finding the Fourth Proportional to 1,342.46, 1,853.44 and 870.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,342.46 : 1,853.44 = 870.59 : x
2. Step 2: Convert to fraction form
   1,342.46/1,853.44 = 870.59/x
3. Step 3: Cross multiply
   1,342.46x = 1,853.44 × 870.59
4. Step 4: Simplify right side
   1,342.46x = 1,613,574.89
5. Step 5: Solve for x
   x = 1,613,574.89/1,342.46
6. Step 6: Final answer
   x = 1,201.96