Finding the Fourth Proportional to 1,384.50, 1,909.43 and 886.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.50 : 1,909.43 = 886.98 : x
2. Step 2: Convert to fraction form
   1,384.50/1,909.43 = 886.98/x
3. Step 3: Cross multiply
   1,384.50x = 1,909.43 × 886.98
4. Step 4: Simplify right side
   1,384.50x = 1,693,621.79
5. Step 5: Solve for x
   x = 1,693,621.79/1,384.50
6. Step 6: Final answer
   x = 1,223.27