Finding the Fourth Proportional to 2,185.29, 3,278.34 and 887.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.29 : 3,278.34 = 887.67 : x
2. Step 2: Convert to fraction form
   2,185.29/3,278.34 = 887.67/x
3. Step 3: Cross multiply
   2,185.29x = 3,278.34 × 887.67
4. Step 4: Simplify right side
   2,185.29x = 2,910,084.07
5. Step 5: Solve for x
   x = 2,910,084.07/2,185.29
6. Step 6: Final answer
   x = 1,331.67