Finding the Fourth Proportional to 1,384.05, 2,076.61 and 836.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.05 : 2,076.61 = 836.62 : x
2. Step 2: Convert to fraction form
   1,384.05/2,076.61 = 836.62/x
3. Step 3: Cross multiply
   1,384.05x = 2,076.61 × 836.62
4. Step 4: Simplify right side
   1,384.05x = 1,737,333.46
5. Step 5: Solve for x
   x = 1,737,333.46/1,384.05
6. Step 6: Final answer
   x = 1,255.25