Finding the Fourth Proportional to 1,383.76, 1,909.41 and 786.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,383.76 : 1,909.41 = 786.04 : x
2. Step 2: Convert to fraction form
   1,383.76/1,909.41 = 786.04/x
3. Step 3: Cross multiply
   1,383.76x = 1,909.41 × 786.04
4. Step 4: Simplify right side
   1,383.76x = 1,500,869.34
5. Step 5: Solve for x
   x = 1,500,869.34/1,383.76
6. Step 6: Final answer
   x = 1,084.63