Finding the Fourth Proportional to 1,384.38, 1,910.66 and 886.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.38 : 1,910.66 = 886.99 : x
2. Step 2: Convert to fraction form
   1,384.38/1,910.66 = 886.99/x
3. Step 3: Cross multiply
   1,384.38x = 1,910.66 × 886.99
4. Step 4: Simplify right side
   1,384.38x = 1,694,736.31
5. Step 5: Solve for x
   x = 1,694,736.31/1,384.38
6. Step 6: Final answer
   x = 1,224.18