Finding the Fourth Proportional to 1,384.74, 1,910.16 and 886.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.74 : 1,910.16 = 886.86 : x
2. Step 2: Convert to fraction form
   1,384.74/1,910.16 = 886.86/x
3. Step 3: Cross multiply
   1,384.74x = 1,910.16 × 886.86
4. Step 4: Simplify right side
   1,384.74x = 1,694,044.50
5. Step 5: Solve for x
   x = 1,694,044.50/1,384.74
6. Step 6: Final answer
   x = 1,223.37