Finding the Fourth Proportional to 1,415.31, 1,952.37 and 855.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,415.31 : 1,952.37 = 855.96 : x
2. Step 2: Convert to fraction form
   1,415.31/1,952.37 = 855.96/x
3. Step 3: Cross multiply
   1,415.31x = 1,952.37 × 855.96
4. Step 4: Simplify right side
   1,415.31x = 1,671,146.35
5. Step 5: Solve for x
   x = 1,671,146.35/1,415.31
6. Step 6: Final answer
   x = 1,180.76