Finding the Fourth Proportional to 2,084.76, 3,127.59 and 786.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,084.76 : 3,127.59 = 786.21 : x
2. Step 2: Convert to fraction form
   2,084.76/3,127.59 = 786.21/x
3. Step 3: Cross multiply
   2,084.76x = 3,127.59 × 786.21
4. Step 4: Simplify right side
   2,084.76x = 2,458,942.53
5. Step 5: Solve for x
   x = 2,458,942.53/2,084.76
6. Step 6: Final answer
   x = 1,179.48